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Auto merge of #121804 - GuillaumeGomez:rollup-jh0v3ex, r=GuillaumeGomez

Browse Source 
Rollup of 7 pull requests

Successful merges:

 - #119748 (Increase visibility of `join_path` and `split_paths`)
 - #120820 (Enable CMPXCHG16B, SSE3, SAHF/LAHF and 128-bit Atomics (in nightly) in Windows x64)
 - #121000 (pattern_analysis: rework how we hide empty private fields)
 - #121376 (Skip unnecessary comparison with half-open range patterns)
 - #121596 (Use volatile access instead of `#[used]` for `on_tls_callback`)
 - #121669 (Count stashed errors again)
 - #121783 (Emitter cleanups)

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2024-02-29 16:10:05 +00:00
commit 1a1876c979
66 changed files with 769 additions and 717 deletions
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2
compiler/rustc_codegen_ssa/src/back/write.rs
View File

@ -373,7 +373,7 @@ pub struct CodegenContext<B: WriteBackendMethods> {
impl<B: WriteBackendMethods> CodegenContext<B> {
pub fn create_dcx(&self) -> DiagCtxt {
DiagCtxt::with_emitter(Box::new(self.diag_emitter.clone()))
DiagCtxt::new(Box::new(self.diag_emitter.clone()))
}
pub fn config(&self, kind: ModuleKind) -> &ModuleConfig {

7
compiler/rustc_driver_impl/src/lib.rs
View File

@ -21,6 +21,7 @@ use rustc_codegen_ssa::{traits::CodegenBackend, CodegenErrors, CodegenResults};
use rustc_data_structures::profiling::{
get_resident_set_size, print_time_passes_entry, TimePassesFormat,
};
use rustc_errors::emitter::stderr_destination;
use rustc_errors::registry::Registry;
use rustc_errors::{
markdown, ColorConfig, DiagCtxt, ErrCode, ErrorGuaranteed, FatalError, PResult,
@ -1384,11 +1385,11 @@ fn report_ice(
) {
let fallback_bundle =
rustc_errors::fallback_fluent_bundle(crate::DEFAULT_LOCALE_RESOURCES.to_vec(), false);
let emitter = Box::new(rustc_errors::emitter::HumanEmitter::stderr(
rustc_errors::ColorConfig::Auto,
let emitter = Box::new(rustc_errors::emitter::HumanEmitter::new(
stderr_destination(rustc_errors::ColorConfig::Auto),
fallback_bundle,
));
let dcx = rustc_errors::DiagCtxt::with_emitter(emitter);
let dcx = rustc_errors::DiagCtxt::new(emitter);
// a .span_bug or .bug call has already printed what
// it wants to print.

8
compiler/rustc_errors/src/diagnostic.rs
View File

@ -1308,11 +1308,9 @@ impl<'a, G: EmissionGuarantee> Diag<'a, G> {
drop(self);
}
/// Stashes diagnostic for possible later improvement in a different,
/// later stage of the compiler. The diagnostic can be accessed with
/// the provided `span` and `key` through [`DiagCtxt::steal_diagnostic()`].
pub fn stash(mut self, span: Span, key: StashKey) {
self.dcx.stash_diagnostic(span, key, self.take_diag());
/// See `DiagCtxt::stash_diagnostic` for details.
pub fn stash(mut self, span: Span, key: StashKey) -> Option<ErrorGuaranteed> {
self.dcx.stash_diagnostic(span, key, self.take_diag())
}
/// Delay emission of this diagnostic as a bug.

61
compiler/rustc_errors/src/emitter.rs
View File

@ -21,12 +21,11 @@ use crate::{
FluentBundle, LazyFallbackBundle, Level, MultiSpan, Subdiag, SubstitutionHighlight,
SuggestionStyle, TerminalUrl,
};
use rustc_lint_defs::pluralize;
use derive_setters::Setters;
use rustc_data_structures::fx::{FxHashMap, FxIndexMap, FxIndexSet};
use rustc_data_structures::sync::{DynSend, IntoDynSyncSend, Lrc};
use rustc_error_messages::{FluentArgs, SpanLabel};
use rustc_lint_defs::pluralize;
use rustc_span::hygiene::{ExpnKind, MacroKind};
use std::borrow::Cow;
use std::cmp::{max, min, Reverse};
@ -35,7 +34,7 @@ use std::io::prelude::*;
use std::io::{self, IsTerminal};
use std::iter;
use std::path::Path;
use termcolor::{Ansi, Buffer, BufferWriter, ColorChoice, ColorSpec, StandardStream};
use termcolor::{Buffer, BufferWriter, ColorChoice, ColorSpec, StandardStream};
use termcolor::{Color, WriteColor};
/// Default column width, used in tests and when terminal dimensions cannot be determined.
@ -58,18 +57,6 @@ impl HumanReadableErrorType {
HumanReadableErrorType::AnnotateSnippet(cc) => (false, cc),
}
}
pub fn new_emitter(
self,
mut dst: Box<dyn WriteColor + Send>,
fallback_bundle: LazyFallbackBundle,
) -> HumanEmitter {
let (short, color_config) = self.unzip();
let color = color_config.suggests_using_colors();
if !dst.supports_color() && color {
dst = Box::new(Ansi::new(dst));
}
HumanEmitter::new(dst, fallback_bundle).short_message(short)
}
}
#[derive(Clone, Copy, Debug)]
@ -130,8 +117,8 @@ impl Margin {
fn was_cut_right(&self, line_len: usize) -> bool {
let right =
if self.computed_right == self.span_right || self.computed_right == self.label_right {
// Account for the "..." padding given above. Otherwise we end up with code lines that
// do fit but end in "..." as if they were trimmed.
// Account for the "..." padding given above. Otherwise we end up with code lines
// that do fit but end in "..." as if they were trimmed.
self.computed_right - 6
} else {
self.computed_right
@ -628,12 +615,6 @@ impl ColorConfig {
ColorConfig::Auto => ColorChoice::Never,
}
}
fn suggests_using_colors(self) -> bool {
match self {
ColorConfig::Always | ColorConfig::Auto => true,
ColorConfig::Never => false,
}
}
}
/// Handles the writing of `HumanReadableErrorType::Default` and `HumanReadableErrorType::Short`
@ -657,19 +638,14 @@ pub struct HumanEmitter {
}
#[derive(Debug)]
pub struct FileWithAnnotatedLines {
pub file: Lrc<SourceFile>,
pub lines: Vec<Line>,
pub(crate) struct FileWithAnnotatedLines {
pub(crate) file: Lrc<SourceFile>,
pub(crate) lines: Vec<Line>,
multiline_depth: usize,
}
impl HumanEmitter {
pub fn stderr(color_config: ColorConfig, fallback_bundle: LazyFallbackBundle) -> HumanEmitter {
let dst = from_stderr(color_config);
Self::create(dst, fallback_bundle)
}
fn create(dst: Destination, fallback_bundle: LazyFallbackBundle) -> HumanEmitter {
pub fn new(dst: Destination, fallback_bundle: LazyFallbackBundle) -> HumanEmitter {
HumanEmitter {
dst: IntoDynSyncSend(dst),
sm: None,
@ -686,13 +662,6 @@ impl HumanEmitter {
}
}
pub fn new(
dst: Box<dyn WriteColor + Send>,
fallback_bundle: LazyFallbackBundle,
) -> HumanEmitter {
Self::create(dst, fallback_bundle)
}
fn maybe_anonymized(&self, line_num: usize) -> Cow<'static, str> {
if self.ui_testing {
Cow::Borrowed(ANONYMIZED_LINE_NUM)
@ -724,8 +693,9 @@ impl HumanEmitter {
.skip(left)
.take_while(|ch| {
// Make sure that the trimming on the right will fall within the terminal width.
// FIXME: `unicode_width` sometimes disagrees with terminals on how wide a `char` is.
// For now, just accept that sometimes the code line will be longer than desired.
// FIXME: `unicode_width` sometimes disagrees with terminals on how wide a `char`
// is. For now, just accept that sometimes the code line will be longer than
// desired.
let next = unicode_width::UnicodeWidthChar::width(*ch).unwrap_or(1);
if taken + next > right - left {
return false;
@ -2228,8 +2198,8 @@ impl HumanEmitter {
buffer.puts(*row_num - 1, max_line_num_len + 3, &line, Style::NoStyle);
*row_num += 1;
}
// If the last line is exactly equal to the line we need to add, we can skip both of them.
// This allows us to avoid output like the following:
// If the last line is exactly equal to the line we need to add, we can skip both of
// them. This allows us to avoid output like the following:
// 2 - &
// 2 + if true { true } else { false }
// 3 - if true { true } else { false }
@ -2586,6 +2556,7 @@ fn num_overlap(
let extra = if inclusive { 1 } else { 0 };
(b_start..b_end + extra).contains(&a_start) || (a_start..a_end + extra).contains(&b_start)
}
fn overlaps(a1: &Annotation, a2: &Annotation, padding: usize) -> bool {
num_overlap(
a1.start_col.display,
@ -2632,7 +2603,7 @@ fn emit_to_destination(
Ok(())
}
pub type Destination = Box<(dyn WriteColor + Send)>;
pub type Destination = Box<dyn WriteColor + Send>;
struct Buffy {
buffer_writer: BufferWriter,
@ -2674,7 +2645,7 @@ impl WriteColor for Buffy {
}
}
fn from_stderr(color: ColorConfig) -> Destination {
pub fn stderr_destination(color: ColorConfig) -> Destination {
let choice = color.to_color_choice();
// On Windows we'll be performing global synchronization on the entire
// system for emitting rustc errors, so there's no need to buffer

3
compiler/rustc_errors/src/error.rs
View File

@ -23,9 +23,11 @@ impl<'args> TranslateError<'args> {
pub fn message(id: &'args Cow<'args, str>, args: &'args FluentArgs<'args>) -> Self {
Self::One { id, args, kind: TranslateErrorKind::MessageMissing }
}
pub fn primary(id: &'args Cow<'args, str>, args: &'args FluentArgs<'args>) -> Self {
Self::One { id, args, kind: TranslateErrorKind::PrimaryBundleMissing }
}
pub fn attribute(
id: &'args Cow<'args, str>,
args: &'args FluentArgs<'args>,
@ -33,6 +35,7 @@ impl<'args> TranslateError<'args> {
) -> Self {
Self::One { id, args, kind: TranslateErrorKind::AttributeMissing { attr } }
}
pub fn value(id: &'args Cow<'args, str>, args: &'args FluentArgs<'args>) -> Self {
Self::One { id, args, kind: TranslateErrorKind::ValueMissing }
}

131
compiler/rustc_errors/src/json.rs
View File

@ -9,42 +9,49 @@
// FIXME: spec the JSON output properly.
use rustc_span::source_map::{FilePathMapping, SourceMap};
use termcolor::{ColorSpec, WriteColor};
use crate::emitter::{should_show_source_code, Emitter, HumanReadableErrorType};
use crate::emitter::{
should_show_source_code, ColorConfig, Destination, Emitter, HumanEmitter,
HumanReadableErrorType,
};
use crate::registry::Registry;
use crate::translation::{to_fluent_args, Translate};
use crate::{
diagnostic::IsLint, CodeSuggestion, FluentBundle, LazyFallbackBundle, MultiSpan, SpanLabel,
Subdiag, TerminalUrl,
};
use rustc_lint_defs::Applicability;
use derive_setters::Setters;
use rustc_data_structures::sync::{IntoDynSyncSend, Lrc};
use rustc_error_messages::FluentArgs;
use rustc_lint_defs::Applicability;
use rustc_span::hygiene::ExpnData;
use rustc_span::source_map::SourceMap;
use rustc_span::Span;
use serde::Serialize;
use std::error::Report;
use std::io::{self, Write};
use std::path::Path;
use std::sync::{Arc, Mutex};
use std::vec;
use serde::Serialize;
use termcolor::{ColorSpec, WriteColor};
#[cfg(test)]
mod tests;
#[derive(Setters)]
pub struct JsonEmitter {
#[setters(skip)]
dst: IntoDynSyncSend<Box<dyn Write + Send>>,
registry: Option<Registry>,
#[setters(skip)]
sm: Lrc<SourceMap>,
fluent_bundle: Option<Lrc<FluentBundle>>,
#[setters(skip)]
fallback_bundle: LazyFallbackBundle,
#[setters(skip)]
pretty: bool,
ui_testing: bool,
ignored_directories_in_source_blocks: Vec<String>,
#[setters(skip)]
json_rendered: HumanReadableErrorType,
diagnostic_width: Option<usize>,
macro_backtrace: bool,
@ -53,98 +60,30 @@ pub struct JsonEmitter {
}
impl JsonEmitter {
pub fn stderr(
registry: Option<Registry>,
source_map: Lrc<SourceMap>,
fluent_bundle: Option<Lrc<FluentBundle>>,
fallback_bundle: LazyFallbackBundle,
pretty: bool,
json_rendered: HumanReadableErrorType,
diagnostic_width: Option<usize>,
macro_backtrace: bool,
track_diagnostics: bool,
terminal_url: TerminalUrl,
) -> JsonEmitter {
JsonEmitter {
dst: IntoDynSyncSend(Box::new(io::BufWriter::new(io::stderr()))),
registry,
sm: source_map,
fluent_bundle,
fallback_bundle,
pretty,
ui_testing: false,
ignored_directories_in_source_blocks: Vec::new(),
json_rendered,
diagnostic_width,
macro_backtrace,
track_diagnostics,
terminal_url,
}
}
pub fn basic(
pretty: bool,
json_rendered: HumanReadableErrorType,
fluent_bundle: Option<Lrc<FluentBundle>>,
fallback_bundle: LazyFallbackBundle,
diagnostic_width: Option<usize>,
macro_backtrace: bool,
track_diagnostics: bool,
terminal_url: TerminalUrl,
) -> JsonEmitter {
let file_path_mapping = FilePathMapping::empty();
JsonEmitter::stderr(
None,
Lrc::new(SourceMap::new(file_path_mapping)),
fluent_bundle,
fallback_bundle,
pretty,
json_rendered,
diagnostic_width,
macro_backtrace,
track_diagnostics,
terminal_url,
)
}
pub fn new(
dst: Box<dyn Write + Send>,
registry: Option<Registry>,
source_map: Lrc<SourceMap>,
fluent_bundle: Option<Lrc<FluentBundle>>,
sm: Lrc<SourceMap>,
fallback_bundle: LazyFallbackBundle,
pretty: bool,
json_rendered: HumanReadableErrorType,
diagnostic_width: Option<usize>,
macro_backtrace: bool,
track_diagnostics: bool,
terminal_url: TerminalUrl,
) -> JsonEmitter {
JsonEmitter {
dst: IntoDynSyncSend(dst),
registry,
sm: source_map,
fluent_bundle,
registry: None,
sm,
fluent_bundle: None,
fallback_bundle,
pretty,
ui_testing: false,
ignored_directories_in_source_blocks: Vec::new(),
json_rendered,
diagnostic_width,
macro_backtrace,
track_diagnostics,
terminal_url,
diagnostic_width: None,
macro_backtrace: false,
track_diagnostics: false,
terminal_url: TerminalUrl::No,
}
}
pub fn ui_testing(self, ui_testing: bool) -> Self {
Self { ui_testing, ..self }
}
pub fn ignored_directories_in_source_blocks(self, value: Vec<String>) -> Self {
Self { ignored_directories_in_source_blocks: value, ..self }
}
fn emit(&mut self, val: EmitTyped<'_>) -> io::Result<()> {
if self.pretty {
serde_json::to_writer_pretty(&mut *self.dst, &val)?
@ -162,7 +101,7 @@ enum EmitTyped<'a> {
Diagnostic(Diagnostic),
Artifact(ArtifactNotification<'a>),
FutureIncompat(FutureIncompatReport<'a>),
UnusedExtern(UnusedExterns<'a, 'a, 'a>),
UnusedExtern(UnusedExterns<'a>),
}
impl Translate for JsonEmitter {
@ -332,14 +271,15 @@ struct FutureIncompatReport<'a> {
// We could unify this struct the one in rustdoc but they have different
// ownership semantics, so doing so would create wasteful allocations.
#[derive(Serialize)]
struct UnusedExterns<'a, 'b, 'c> {
struct UnusedExterns<'a> {
/// The severity level of the unused dependencies lint
lint_level: &'a str,
/// List of unused externs by their names.
unused_extern_names: &'b [&'c str],
unused_extern_names: &'a [&'a str],
}
impl Diagnostic {
/// Converts from `rustc_errors::DiagInner` to `Diagnostic`.
fn from_errors_diagnostic(diag: crate::DiagInner, je: &JsonEmitter) -> Diagnostic {
let args = to_fluent_args(diag.args.iter());
let sugg = diag.suggestions.iter().flatten().map(|sugg| {
@ -405,9 +345,14 @@ impl Diagnostic {
.collect();
let buf = BufWriter::default();
let output = buf.clone();
je.json_rendered
.new_emitter(Box::new(buf), je.fallback_bundle.clone())
let mut dst: Destination = Box::new(buf.clone());
let (short, color_config) = je.json_rendered.unzip();
match color_config {
ColorConfig::Always | ColorConfig::Auto => dst = Box::new(termcolor::Ansi::new(dst)),
ColorConfig::Never => {}
}
HumanEmitter::new(dst, je.fallback_bundle.clone())
.short_message(short)
.sm(Some(je.sm.clone()))
.fluent_bundle(je.fluent_bundle.clone())
.diagnostic_width(je.diagnostic_width)
@ -417,8 +362,8 @@ impl Diagnostic {
.ui_testing(je.ui_testing)
.ignored_directories_in_source_blocks(je.ignored_directories_in_source_blocks.clone())
.emit_diagnostic(diag);
let output = Arc::try_unwrap(output.0).unwrap().into_inner().unwrap();
let output = String::from_utf8(output).unwrap();
let buf = Arc::try_unwrap(buf.0).unwrap().into_inner().unwrap();
let buf = String::from_utf8(buf).unwrap();
Diagnostic {
message: translated_message.to_string(),
@ -426,7 +371,7 @@ impl Diagnostic {
level,
spans,
children,
rendered: Some(output),
rendered: Some(buf),
}
}

12
compiler/rustc_errors/src/json/tests.rs
View File

@ -1,7 +1,7 @@
use super::*;
use crate::emitter::ColorConfig;
use crate::DiagCtxt;
use rustc_span::source_map::FilePathMapping;
use rustc_span::BytePos;
use std::str;
@ -48,20 +48,14 @@ fn test_positions(code: &str, span: (u32, u32), expected_output: SpanTestData) {
let output = Arc::new(Mutex::new(Vec::new()));
let je = JsonEmitter::new(
Box::new(Shared { data: output.clone() }),
None,
sm,
None,
fallback_bundle,
true,
true, // pretty
HumanReadableErrorType::Short(ColorConfig::Never),
None,
false,
false,
TerminalUrl::No,
);
let span = Span::with_root_ctxt(BytePos(span.0), BytePos(span.1));
let dcx = DiagCtxt::with_emitter(Box::new(je));
let dcx = DiagCtxt::new(Box::new(je));
dcx.span_err(span, "foo");
let bytes = output.lock().unwrap();

244
compiler/rustc_errors/src/lib.rs
View File

@ -59,11 +59,11 @@ pub use snippet::Style;
// See https://github.com/rust-lang/rust/pull/115393.
pub use termcolor::{Color, ColorSpec, WriteColor};
use emitter::{is_case_difference, DynEmitter, Emitter, HumanEmitter};
use emitter::{is_case_difference, DynEmitter, Emitter};
use registry::Registry;
use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet};
use rustc_data_structures::stable_hasher::{Hash128, StableHasher};
use rustc_data_structures::sync::{Lock, Lrc};
use rustc_data_structures::sync::Lock;
use rustc_data_structures::AtomicRef;
use rustc_lint_defs::LintExpectationId;
use rustc_span::source_map::SourceMap;
@ -217,10 +217,10 @@ impl CodeSuggestion {
use rustc_span::{CharPos, Pos};
/// Extracts a substring from the provided `line_opt` based on the specified low and high indices,
/// appends it to the given buffer `buf`, and returns the count of newline characters in the substring
/// for accurate highlighting.
/// If `line_opt` is `None`, a newline character is appended to the buffer, and 0 is returned.
/// Extracts a substring from the provided `line_opt` based on the specified low and high
/// indices, appends it to the given buffer `buf`, and returns the count of newline
/// characters in the substring for accurate highlighting. If `line_opt` is `None`, a
/// newline character is appended to the buffer, and 0 is returned.
///
/// ## Returns
///
@ -434,10 +434,6 @@ struct DiagCtxtInner {
/// The delayed bugs and their error guarantees.
delayed_bugs: Vec<(DelayedDiagInner, ErrorGuaranteed)>,
/// The number of stashed errors. Unlike the other counts, this can go up
/// and down, so it doesn't guarantee anything.
stashed_err_count: usize,
/// The error count shown to the user at the end.
deduplicated_err_count: usize,
/// The warning count shown to the user at the end.
@ -475,7 +471,7 @@ struct DiagCtxtInner {
/// add more information). All stashed diagnostics must be emitted with
/// `emit_stashed_diagnostics` by the time the `DiagCtxtInner` is dropped,
/// otherwise an assertion failure will occur.
stashed_diagnostics: FxIndexMap<(Span, StashKey), DiagInner>,
stashed_diagnostics: FxIndexMap<(Span, StashKey), (DiagInner, Option<ErrorGuaranteed>)>,
future_breakage_diagnostics: Vec<DiagInner>,
@ -486,8 +482,8 @@ struct DiagCtxtInner {
/// have been converted.
check_unstable_expect_diagnostics: bool,
/// Expected [`DiagInner`][struct@diagnostic::DiagInner]s store a [`LintExpectationId`] as part of
/// the lint level. [`LintExpectationId`]s created early during the compilation
/// Expected [`DiagInner`][struct@diagnostic::DiagInner]s store a [`LintExpectationId`] as part
/// of the lint level. [`LintExpectationId`]s created early during the compilation
/// (before `HirId`s have been defined) are not stable and can therefore not be
/// stored on disk. This buffer stores these diagnostics until the ID has been
/// replaced by a stable [`LintExpectationId`]. The [`DiagInner`][struct@diagnostic::DiagInner]s
@ -559,10 +555,18 @@ pub struct DiagCtxtFlags {
impl Drop for DiagCtxtInner {
fn drop(&mut self) {
// Any stashed diagnostics should have been handled by
// `emit_stashed_diagnostics` by now.
assert!(self.stashed_diagnostics.is_empty());
// For tools using `interface::run_compiler` (e.g. rustc, rustdoc)
// stashed diagnostics will have already been emitted. But for others
// that don't use `interface::run_compiler` (e.g. rustfmt, some clippy
// lints) this fallback is necessary.
//
// Important: it is sound to produce an `ErrorGuaranteed` when stashing
// errors because they are guaranteed to be emitted here or earlier.
self.emit_stashed_diagnostics();
// Important: it is sound to produce an `ErrorGuaranteed` when emitting
// delayed bugs because they are guaranteed to be emitted here if
// necessary.
if self.err_guars.is_empty() {
self.flush_delayed()
}
@ -586,13 +590,6 @@ impl Drop for DiagCtxtInner {
}
impl DiagCtxt {
pub fn with_tty_emitter(
sm: Option<Lrc<SourceMap>>,
fallback_bundle: LazyFallbackBundle,
) -> Self {
let emitter = Box::new(HumanEmitter::stderr(ColorConfig::Auto, fallback_bundle).sm(sm));
Self::with_emitter(emitter)
}
pub fn disable_warnings(mut self) -> Self {
self.inner.get_mut().flags.can_emit_warnings = false;
self
@ -608,14 +605,13 @@ impl DiagCtxt {
self
}
pub fn with_emitter(emitter: Box<DynEmitter>) -> Self {
pub fn new(emitter: Box<DynEmitter>) -> Self {
Self {
inner: Lock::new(DiagCtxtInner {
flags: DiagCtxtFlags { can_emit_warnings: true, ..Default::default() },
err_guars: Vec::new(),
lint_err_guars: Vec::new(),
delayed_bugs: Vec::new(),
stashed_err_count: 0,
deduplicated_err_count: 0,
deduplicated_warn_count: 0,
emitter,
@ -676,7 +672,6 @@ impl DiagCtxt {
err_guars,
lint_err_guars,
delayed_bugs,
stashed_err_count,
deduplicated_err_count,
deduplicated_warn_count,
emitter: _,
@ -699,7 +694,6 @@ impl DiagCtxt {
*err_guars = Default::default();
*lint_err_guars = Default::default();
*delayed_bugs = Default::default();
*stashed_err_count = 0;
*deduplicated_err_count = 0;
*deduplicated_warn_count = 0;
*must_produce_diag = false;
@ -715,39 +709,111 @@ impl DiagCtxt {
*fulfilled_expectations = Default::default();
}
/// Stash a given diagnostic with the given `Span` and [`StashKey`] as the key.
/// Retrieve a stashed diagnostic with `steal_diagnostic`.
pub fn stash_diagnostic(&self, span: Span, key: StashKey, diag: DiagInner) {
let mut inner = self.inner.borrow_mut();
let key = (span.with_parent(None), key);
if diag.is_error() {
if diag.is_lint.is_none() {
inner.stashed_err_count += 1;
}
}
/// Stashes a diagnostic for possible later improvement in a different,
/// later stage of the compiler. Possible actions depend on the diagnostic
/// level:
/// - Level::Error: immediately counted as an error that has occurred, because it
/// is guaranteed to be emitted eventually. Can be later accessed with the
/// provided `span` and `key` through
/// [`DiagCtxt::try_steal_modify_and_emit_err`] or
/// [`DiagCtxt::try_steal_replace_and_emit_err`]. These do not allow
/// cancellation or downgrading of the error. Returns
/// `Some(ErrorGuaranteed)`.
/// - Level::Warning and lower (i.e. !is_error()): can be accessed with the
/// provided `span` and `key` through [`DiagCtxt::steal_non_err()`]. This
/// allows cancelling and downgrading of the diagnostic. Returns `None`.
/// - Others: not allowed, will trigger a panic.
pub fn stash_diagnostic(
&self,
span: Span,
key: StashKey,
diag: DiagInner,
) -> Option<ErrorGuaranteed> {
let guar = if diag.level() == Level::Error {
// This `unchecked_error_guaranteed` is valid. It is where the
// `ErrorGuaranteed` for stashed errors originates. See
// `DiagCtxtInner::drop`.
#[allow(deprecated)]
Some(ErrorGuaranteed::unchecked_error_guaranteed())
} else if !diag.is_error() {
None
} else {
self.span_bug(span, format!("invalid level in `stash_diagnostic`: {}", diag.level));
};
// FIXME(Centril, #69537): Consider reintroducing panic on overwriting a stashed diagnostic
// if/when we have a more robust macro-friendly replacement for `(span, key)` as a key.
// See the PR for a discussion.
inner.stashed_diagnostics.insert(key, diag);
let key = (span.with_parent(None), key);
self.inner.borrow_mut().stashed_diagnostics.insert(key, (diag, guar));
guar
}
/// Steal a previously stashed diagnostic with the given `Span` and [`StashKey`] as the key.
pub fn steal_diagnostic(&self, span: Span, key: StashKey) -> Option<Diag<'_, ()>> {
let mut inner = self.inner.borrow_mut();
/// Steal a previously stashed non-error diagnostic with the given `Span`
/// and [`StashKey`] as the key. Panics if the found diagnostic is an
/// error.
pub fn steal_non_err(&self, span: Span, key: StashKey) -> Option<Diag<'_, ()>> {
let key = (span.with_parent(None), key);
// FIXME(#120456) - is `swap_remove` correct?
let diag = inner.stashed_diagnostics.swap_remove(&key)?;
if diag.is_error() {
if diag.is_lint.is_none() {
inner.stashed_err_count -= 1;
}
}
let (diag, guar) = self.inner.borrow_mut().stashed_diagnostics.swap_remove(&key)?;
assert!(!diag.is_error());
assert!(guar.is_none());
Some(Diag::new_diagnostic(self, diag))
}
/// Steals a previously stashed error with the given `Span` and
/// [`StashKey`] as the key, modifies it, and emits it. Returns `None` if
/// no matching diagnostic is found. Panics if the found diagnostic's level
/// isn't `Level::Error`.
pub fn try_steal_modify_and_emit_err<F>(
&self,
span: Span,
key: StashKey,
mut modify_err: F,
) -> Option<ErrorGuaranteed>
where
F: FnMut(&mut Diag<'_>),
{
let key = (span.with_parent(None), key);
// FIXME(#120456) - is `swap_remove` correct?
let err = self.inner.borrow_mut().stashed_diagnostics.swap_remove(&key);
err.map(|(err, guar)| {
// The use of `::<ErrorGuaranteed>` is safe because level is `Level::Error`.
assert_eq!(err.level, Level::Error);
assert!(guar.is_some());
let mut err = Diag::<ErrorGuaranteed>::new_diagnostic(self, err);
modify_err(&mut err);
assert_eq!(err.level, Level::Error);
err.emit()
})
}
/// Steals a previously stashed error with the given `Span` and
/// [`StashKey`] as the key, cancels it if found, and emits `new_err`.
/// Panics if the found diagnostic's level isn't `Level::Error`.
pub fn try_steal_replace_and_emit_err(
&self,
span: Span,
key: StashKey,
new_err: Diag<'_>,
) -> ErrorGuaranteed {
let key = (span.with_parent(None), key);
// FIXME(#120456) - is `swap_remove` correct?
let old_err = self.inner.borrow_mut().stashed_diagnostics.swap_remove(&key);
match old_err {
Some((old_err, guar)) => {
assert_eq!(old_err.level, Level::Error);
assert!(guar.is_some());
// Because `old_err` has already been counted, it can only be
// safely cancelled because the `new_err` supplants it.
Diag::<ErrorGuaranteed>::new_diagnostic(self, old_err).cancel();
}
None => {}
};
new_err.emit()
}
pub fn has_stashed_diagnostic(&self, span: Span, key: StashKey) -> bool {
self.inner.borrow().stashed_diagnostics.get(&(span.with_parent(None), key)).is_some()
}
@ -757,41 +823,40 @@ impl DiagCtxt {
self.inner.borrow_mut().emit_stashed_diagnostics()
}
/// This excludes lint errors, delayed bugs and stashed errors.
/// This excludes lint errors, and delayed bugs.
#[inline]
pub fn err_count_excluding_lint_errs(&self) -> usize {
self.inner.borrow().err_guars.len()
let inner = self.inner.borrow();
inner.err_guars.len()
+ inner
.stashed_diagnostics
.values()
.filter(|(diag, guar)| guar.is_some() && diag.is_lint.is_none())
.count()
}
/// This excludes delayed bugs and stashed errors.
/// This excludes delayed bugs.
#[inline]
pub fn err_count(&self) -> usize {
let inner = self.inner.borrow();
inner.err_guars.len() + inner.lint_err_guars.len()
inner.err_guars.len()
+ inner.lint_err_guars.len()
+ inner.stashed_diagnostics.values().filter(|(_diag, guar)| guar.is_some()).count()
}
/// This excludes normal errors, lint errors, and delayed bugs. Unless
/// absolutely necessary, avoid using this. It's dubious because stashed
/// errors can later be cancelled, so the presence of a stashed error at
/// some point of time doesn't guarantee anything -- there are no
/// `ErrorGuaranteed`s here.
pub fn stashed_err_count(&self) -> usize {
self.inner.borrow().stashed_err_count
}
/// This excludes lint errors, delayed bugs, and stashed errors. Unless
/// absolutely necessary, prefer `has_errors` to this method.
/// This excludes lint errors and delayed bugs. Unless absolutely
/// necessary, prefer `has_errors` to this method.
pub fn has_errors_excluding_lint_errors(&self) -> Option<ErrorGuaranteed> {
self.inner.borrow().has_errors_excluding_lint_errors()
}
/// This excludes delayed bugs and stashed errors.
/// This excludes delayed bugs.
pub fn has_errors(&self) -> Option<ErrorGuaranteed> {
self.inner.borrow().has_errors()
}
/// This excludes stashed errors. Unless absolutely necessary, prefer
/// `has_errors` to this method.
/// This excludes nothing. Unless absolutely necessary, prefer `has_errors`
/// to this method.
pub fn has_errors_or_delayed_bugs(&self) -> Option<ErrorGuaranteed> {
self.inner.borrow().has_errors_or_delayed_bugs()
}
@ -876,10 +941,10 @@ impl DiagCtxt {
}
}
/// This excludes delayed bugs and stashed errors. Used for early aborts
/// after errors occurred -- e.g. because continuing in the face of errors is
/// likely to lead to bad results, such as spurious/uninteresting
/// additional errors -- when returning an error `Result` is difficult.
/// This excludes delayed bugs. Used for early aborts after errors occurred
/// -- e.g. because continuing in the face of errors is likely to lead to
/// bad results, such as spurious/uninteresting additional errors -- when
/// returning an error `Result` is difficult.
pub fn abort_if_errors(&self) {
if self.has_errors().is_some() {
FatalError.raise();
@ -963,7 +1028,7 @@ impl DiagCtxt {
inner
.stashed_diagnostics
.values_mut()
.for_each(|diag| diag.update_unstable_expectation_id(unstable_to_stable));
.for_each(|(diag, _guar)| diag.update_unstable_expectation_id(unstable_to_stable));
inner
.future_breakage_diagnostics
.iter_mut()
@ -1270,12 +1335,8 @@ impl DiagCtxtInner {
fn emit_stashed_diagnostics(&mut self) -> Option<ErrorGuaranteed> {
let mut guar = None;
let has_errors = !self.err_guars.is_empty();
for (_, diag) in std::mem::take(&mut self.stashed_diagnostics).into_iter() {
if diag.is_error() {
if diag.is_lint.is_none() {
self.stashed_err_count -= 1;
}
} else {
for (_, (diag, _guar)) in std::mem::take(&mut self.stashed_diagnostics).into_iter() {
if !diag.is_error() {
// Unless they're forced, don't flush stashed warnings when
// there are errors, to avoid causing warning overload. The
// stash would've been stolen already if it were important.
@ -1334,7 +1395,8 @@ impl DiagCtxtInner {
} else {
let backtrace = std::backtrace::Backtrace::capture();
// This `unchecked_error_guaranteed` is valid. It is where the
// `ErrorGuaranteed` for delayed bugs originates.
// `ErrorGuaranteed` for delayed bugs originates. See
// `DiagCtxtInner::drop`.
#[allow(deprecated)]
let guar = ErrorGuaranteed::unchecked_error_guaranteed();
self.delayed_bugs
@ -1446,11 +1508,31 @@ impl DiagCtxtInner {
}
fn has_errors_excluding_lint_errors(&self) -> Option<ErrorGuaranteed> {
self.err_guars.get(0).copied()
self.err_guars.get(0).copied().or_else(|| {
if let Some((_diag, guar)) = self
.stashed_diagnostics
.values()
.find(|(diag, guar)| guar.is_some() && diag.is_lint.is_none())
{
*guar
} else {
None
}
})
}
fn has_errors(&self) -> Option<ErrorGuaranteed> {
self.has_errors_excluding_lint_errors().or_else(|| self.lint_err_guars.get(0).copied())
self.err_guars.get(0).copied().or_else(|| self.lint_err_guars.get(0).copied()).or_else(
|| {
if let Some((_diag, guar)) =
self.stashed_diagnostics.values().find(|(_diag, guar)| guar.is_some())
{
*guar
} else {
None
}
},
)
}
fn has_errors_or_delayed_bugs(&self) -> Option<ErrorGuaranteed> {

2
compiler/rustc_expand/src/tests.rs
View File

@ -33,7 +33,7 @@ fn create_test_handler() -> (DiagCtxt, Lrc<SourceMap>, Arc<Mutex<Vec<u8>>>) {
let emitter = HumanEmitter::new(Box::new(Shared { data: output.clone() }), fallback_bundle)
.sm(Some(source_map.clone()))
.diagnostic_width(Some(140));
let dcx = DiagCtxt::with_emitter(Box::new(emitter));
let dcx = DiagCtxt::new(Box::new(emitter));
(dcx, source_map, output)
}

12
compiler/rustc_hir_analysis/src/astconv/lint.rs
View File

@ -1,5 +1,5 @@
use rustc_ast::TraitObjectSyntax;
use rustc_errors::{codes::*, Diag, EmissionGuarantee, StashKey};
use rustc_errors::{codes::*, Diag, EmissionGuarantee, Level, StashKey};
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
use rustc_lint_defs::{builtin::BARE_TRAIT_OBJECTS, Applicability};
@ -237,7 +237,15 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
}
// check if the impl trait that we are considering is a impl of a local trait
self.maybe_lint_blanket_trait_impl(self_ty, &mut diag);
diag.stash(self_ty.span, StashKey::TraitMissingMethod);
match diag.level() {
Level::Error => {
diag.stash(self_ty.span, StashKey::TraitMissingMethod);
}
Level::DelayedBug => {
diag.emit();
}
_ => unreachable!(),
}
} else {
let msg = "trait objects without an explicit `dyn` are deprecated";
tcx.node_span_lint(BARE_TRAIT_OBJECTS, self_ty.hir_id, self_ty.span, msg, |lint| {

3
compiler/rustc_hir_analysis/src/check/check.rs
View File

@ -1350,8 +1350,7 @@ fn check_type_alias_type_params_are_used<'tcx>(tcx: TyCtxt<'tcx>, def_id: LocalD
let ty = tcx.type_of(def_id).instantiate_identity();
if ty.references_error() {
// If there is already another error, do not emit an error for not using a type parameter.
// Without the `stashed_err_count` part this can fail (#120856).
assert!(tcx.dcx().has_errors().is_some() || tcx.dcx().stashed_err_count() > 0);
assert!(tcx.dcx().has_errors().is_some());
return;
}

22
compiler/rustc_hir_analysis/src/collect/type_of.rs
View File

@ -596,10 +596,11 @@ fn infer_placeholder_type<'a>(
// then the user may have written e.g. `const A = 42;`.
// In this case, the parser has stashed a diagnostic for
// us to improve in typeck so we do that now.
match tcx.dcx().steal_diagnostic(span, StashKey::ItemNoType) {
Some(mut err) => {
let guar = tcx
.dcx()
.try_steal_modify_and_emit_err(span, StashKey::ItemNoType, |err| {
if !ty.references_error() {
// Only suggest adding `:` if it was missing (and suggested by parsing diagnostic)
// Only suggest adding `:` if it was missing (and suggested by parsing diagnostic).
let colon = if span == item_ident.span.shrink_to_hi() { ":" } else { "" };
// The parser provided a sub-optimal `HasPlaceholders` suggestion for the type.
@ -622,12 +623,8 @@ fn infer_placeholder_type<'a>(
));
}
}
err.emit();
// diagnostic stashing loses the information of whether something is a hard error.
Ty::new_error_with_message(tcx, span, "ItemNoType is a hard error")
}
None => {
})
.unwrap_or_else(|| {
let mut diag = bad_placeholder(tcx, vec![span], kind);
if !ty.references_error() {
@ -645,10 +642,9 @@ fn infer_placeholder_type<'a>(
));
}
}
Ty::new_error(tcx, diag.emit())
}
}
diag.emit()
});
Ty::new_error(tcx, guar)
}
fn check_feature_inherent_assoc_ty(tcx: TyCtxt<'_>, span: Span) {

17
compiler/rustc_hir_typeck/src/callee.rs
View File

@ -484,12 +484,17 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
if let hir::ExprKind::Path(hir::QPath::Resolved(_, path)) = &callee_expr.kind
&& let [segment] = path.segments
&& let Some(mut diag) =
self.dcx().steal_diagnostic(segment.ident.span, StashKey::CallIntoMethod)
{
// Try suggesting `foo(a)` -> `a.foo()` if possible.
self.suggest_call_as_method(&mut diag, segment, arg_exprs, call_expr, expected);
diag.emit();
self.dcx().try_steal_modify_and_emit_err(
segment.ident.span,
StashKey::CallIntoMethod,
|err| {
// Try suggesting `foo(a)` -> `a.foo()` if possible.
self.suggest_call_as_method(
err, segment, arg_exprs, call_expr, expected,
);
},
);
}
let err = self.report_invalid_callee(call_expr, callee_expr, callee_ty, arg_exprs);
@ -601,7 +606,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
/// and suggesting the fix if the method probe is successful.
fn suggest_call_as_method(
&self,
diag: &mut Diag<'_, ()>,
diag: &mut Diag<'_>,
segment: &'tcx hir::PathSegment<'tcx>,
arg_exprs: &'tcx [hir::Expr<'tcx>],
call_expr: &'tcx hir::Expr<'tcx>,

45
compiler/rustc_hir_typeck/src/expr.rs
View File

@ -1460,18 +1460,18 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
&& let hir::ArrayLen::Body(hir::AnonConst { hir_id, .. }) = length
{
let span = self.tcx.hir().span(hir_id);
match self.dcx().steal_diagnostic(span, StashKey::UnderscoreForArrayLengths) {
Some(mut err) => {
self.dcx().try_steal_modify_and_emit_err(
span,
StashKey::UnderscoreForArrayLengths,
|err| {
err.span_suggestion(
span,
"consider specifying the array length",
array_len,
Applicability::MaybeIncorrect,
);
err.emit();
}
None => (),
}
},
);
}
}
@ -1751,11 +1751,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let (_, diag) =
self.demand_coerce_diag(field.expr, ty, field_type, None, AllowTwoPhase::No);
if let Some(mut diag) = diag {
if let Some(diag) = diag {
if idx == ast_fields.len() - 1 {
if remaining_fields.is_empty() {
self.suggest_fru_from_range(field, variant, args, &mut diag);
diag.emit();
self.suggest_fru_from_range_and_emit(field, variant, args, diag);
} else {
diag.stash(field.span, StashKey::MaybeFruTypo);
}
@ -1986,20 +1985,20 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
err.span_label(span, format!("missing {remaining_fields_names}{truncated_fields_error}"));
if let Some(last) = ast_fields.last() {
self.suggest_fru_from_range(last, variant, args, &mut err);
self.suggest_fru_from_range_and_emit(last, variant, args, err);
} else {
err.emit();
}
err.emit();
}
/// If the last field is a range literal, but it isn't supposed to be, then they probably
/// meant to use functional update syntax.
fn suggest_fru_from_range(
fn suggest_fru_from_range_and_emit(
&self,
last_expr_field: &hir::ExprField<'tcx>,
variant: &ty::VariantDef,
args: GenericArgsRef<'tcx>,
err: &mut Diag<'_>,
mut err: Diag<'_>,
) {
// I don't use 'is_range_literal' because only double-sided, half-open ranges count.
if let ExprKind::Struct(QPath::LangItem(LangItem::Range, ..), [range_start, range_end], _) =
@ -2012,16 +2011,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
.map(|adt| adt.did())
!= range_def_id
{
// Suppress any range expr type mismatches
if let Some(diag) =
self.dcx().steal_diagnostic(last_expr_field.span, StashKey::MaybeFruTypo)
{
diag.delay_as_bug();
}
// Use a (somewhat arbitrary) filtering heuristic to avoid printing
// expressions that are either too long, or have control character
//such as newlines in them.
// such as newlines in them.
let expr = self
.tcx
.sess
@ -2043,6 +2035,15 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
self.dcx(),
TypeMismatchFruTypo { expr_span: range_start.span, fru_span, expr },
);
// Suppress any range expr type mismatches
self.dcx().try_steal_replace_and_emit_err(
last_expr_field.span,
StashKey::MaybeFruTypo,
err,
);
} else {
err.emit();
}
}

31
compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
View File

@ -848,11 +848,12 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
.resolve_fully_qualified_call(span, item_name, ty.normalized, qself.span, hir_id)
.map(|r| {
// lint bare trait if the method is found in the trait
if span.edition().at_least_rust_2021()
&& let Some(diag) =
self.dcx().steal_diagnostic(qself.span, StashKey::TraitMissingMethod)
{
diag.emit();
if span.edition().at_least_rust_2021() {
self.dcx().try_steal_modify_and_emit_err(
qself.span,
StashKey::TraitMissingMethod,
|_err| {},
);
}
r
})
@ -879,17 +880,15 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
);
}
// emit or cancel the diagnostic for bare traits
if span.edition().at_least_rust_2021()
&& let Some(diag) =
self.dcx().steal_diagnostic(qself.span, StashKey::TraitMissingMethod)
{
if trait_missing_method {
// cancel the diag for bare traits when meeting `MyTrait::missing_method`
diag.cancel();
} else {
diag.emit();
}
// Emit the diagnostic for bare traits. (We used to cancel for slightly better
// error messages, but cancelling stashed diagnostics is no longer allowed because
// it causes problems when tracking whether errors have actually occurred.)
if span.edition().at_least_rust_2021() {
self.dcx().try_steal_modify_and_emit_err(
qself.span,
StashKey::TraitMissingMethod,
|_err| {},
);
}
if item_name.name != kw::Empty {

76
compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs
View File

@ -1941,53 +1941,49 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
errors_causecode: Vec<(Span, ObligationCauseCode<'tcx>)>,
) {
for (span, code) in errors_causecode {
let Some(mut diag) = self.dcx().steal_diagnostic(span, StashKey::MaybeForgetReturn)
else {
continue;
};
if let Some(fn_sig) = self.body_fn_sig()
&& let ExprBindingObligation(_, _, hir_id, ..) = code
&& !fn_sig.output().is_unit()
{
let mut block_num = 0;
let mut found_semi = false;
for (_, node) in self.tcx.hir().parent_iter(hir_id) {
match node {
hir::Node::Stmt(stmt) => {
if let hir::StmtKind::Semi(expr) = stmt.kind {
let expr_ty = self.typeck_results.borrow().expr_ty(expr);
let return_ty = fn_sig.output();
if !matches!(expr.kind, hir::ExprKind::Ret(..))
&& self.can_coerce(expr_ty, return_ty)
{
found_semi = true;
self.dcx().try_steal_modify_and_emit_err(span, StashKey::MaybeForgetReturn, |err| {
if let Some(fn_sig) = self.body_fn_sig()
&& let ExprBindingObligation(_, _, hir_id, ..) = code
&& !fn_sig.output().is_unit()
{
let mut block_num = 0;
let mut found_semi = false;
for (_, node) in self.tcx.hir().parent_iter(hir_id) {
match node {
hir::Node::Stmt(stmt) => {
if let hir::StmtKind::Semi(expr) = stmt.kind {
let expr_ty = self.typeck_results.borrow().expr_ty(expr);
let return_ty = fn_sig.output();
if !matches!(expr.kind, hir::ExprKind::Ret(..))
&& self.can_coerce(expr_ty, return_ty)
{
found_semi = true;
}
}
}
}
hir::Node::Block(_block) => {
if found_semi {
block_num += 1;
hir::Node::Block(_block) => {
if found_semi {
block_num += 1;
}
}
}
hir::Node::Item(item) => {
if let hir::ItemKind::Fn(..) = item.kind {
break;
hir::Node::Item(item) => {
if let hir::ItemKind::Fn(..) = item.kind {
break;
}
}
_ => {}
}
_ => {}
}
if block_num > 1 && found_semi {
err.span_suggestion_verbose(
span.shrink_to_lo(),
"you might have meant to return this to infer its type parameters",
"return ",
Applicability::MaybeIncorrect,
);
}
}
if block_num > 1 && found_semi {
diag.span_suggestion_verbose(
span.shrink_to_lo(),
"you might have meant to return this to infer its type parameters",
"return ",
Applicability::MaybeIncorrect,
);
}
}
diag.emit();
});
}
}

100
compiler/rustc_hir_typeck/src/method/suggest.rs
View File

@ -2194,59 +2194,59 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let [seg1, seg2] = segs else {
return;
};
let Some(mut diag) =
self.dcx().steal_diagnostic(seg1.ident.span, StashKey::CallAssocMethod)
else {
return;
};
let map = self.infcx.tcx.hir();
let body_id = self.tcx.hir().body_owned_by(self.body_id);
let body = map.body(body_id);
struct LetVisitor<'a> {
result: Option<&'a hir::Expr<'a>>,
ident_name: Symbol,
}
// FIXME: This really should be taking scoping, etc into account.
impl<'v> Visitor<'v> for LetVisitor<'v> {
fn visit_stmt(&mut self, ex: &'v hir::Stmt<'v>) {
if let hir::StmtKind::Local(hir::Local { pat, init, .. }) = &ex.kind
&& let Binding(_, _, ident, ..) = pat.kind
&& ident.name == self.ident_name
{
self.result = *init;
} else {
hir::intravisit::walk_stmt(self, ex);
self.dcx().try_steal_modify_and_emit_err(
seg1.ident.span,
StashKey::CallAssocMethod,
|err| {
let map = self.infcx.tcx.hir();
let body_id = self.tcx.hir().body_owned_by(self.body_id);
let body = map.body(body_id);
struct LetVisitor<'a> {
result: Option<&'a hir::Expr<'a>>,
ident_name: Symbol,
}
}
}
let mut visitor = LetVisitor { result: None, ident_name: seg1.ident.name };
visitor.visit_body(body);
// FIXME: This really should be taking scoping, etc into account.
impl<'v> Visitor<'v> for LetVisitor<'v> {
fn visit_stmt(&mut self, ex: &'v hir::Stmt<'v>) {
if let hir::StmtKind::Local(hir::Local { pat, init, .. }) = &ex.kind
&& let Binding(_, _, ident, ..) = pat.kind
&& ident.name == self.ident_name
{
self.result = *init;
} else {
hir::intravisit::walk_stmt(self, ex);
}
}
}
if let Node::Expr(call_expr) = self.tcx.parent_hir_node(seg1.hir_id)
&& let Some(expr) = visitor.result
&& let Some(self_ty) = self.node_ty_opt(expr.hir_id)
{
let probe = self.lookup_probe_for_diagnostic(
seg2.ident,
self_ty,
call_expr,
ProbeScope::TraitsInScope,
None,
);
if probe.is_ok() {
let sm = self.infcx.tcx.sess.source_map();
diag.span_suggestion_verbose(
sm.span_extend_while(seg1.ident.span.shrink_to_hi(), |c| c == ':').unwrap(),
"you may have meant to call an instance method",
".",
Applicability::MaybeIncorrect,
);
}
}
diag.emit();
let mut visitor = LetVisitor { result: None, ident_name: seg1.ident.name };
visitor.visit_body(body);
if let Node::Expr(call_expr) = self.tcx.parent_hir_node(seg1.hir_id)
&& let Some(expr) = visitor.result
&& let Some(self_ty) = self.node_ty_opt(expr.hir_id)
{
let probe = self.lookup_probe_for_diagnostic(
seg2.ident,
self_ty,
call_expr,
ProbeScope::TraitsInScope,
None,
);
if probe.is_ok() {
let sm = self.infcx.tcx.sess.source_map();
err.span_suggestion_verbose(
sm.span_extend_while(seg1.ident.span.shrink_to_hi(), |c| c == ':')
.unwrap(),
"you may have meant to call an instance method",
".",
Applicability::MaybeIncorrect,
);
}
}
},
);
}
/// Suggest calling a method on a field i.e. `a.field.bar()` instead of `a.bar()`

4
compiler/rustc_hir_typeck/src/writeback.rs
View File

@ -772,10 +772,6 @@ impl<'cx, 'tcx> Resolver<'cx, 'tcx> {
fn report_error(&self, p: impl Into<ty::GenericArg<'tcx>>) -> ErrorGuaranteed {
if let Some(guar) = self.fcx.dcx().has_errors() {
guar
} else if self.fcx.dcx().stashed_err_count() > 0 {
// Without this case we sometimes get uninteresting and extraneous
// "type annotations needed" errors.
self.fcx.dcx().delayed_bug("error in Resolver")
} else {
self.fcx
.err_ctxt()

1
compiler/rustc_infer/src/infer/at.rs
View File

@ -87,7 +87,6 @@ impl<'tcx> InferCtxt<'tcx> {
reported_signature_mismatch: self.reported_signature_mismatch.clone(),
tainted_by_errors: self.tainted_by_errors.clone(),
err_count_on_creation: self.err_count_on_creation,
stashed_err_count_on_creation: self.stashed_err_count_on_creation,
universe: self.universe.clone(),
intercrate,
next_trait_solver: self.next_trait_solver,

15
compiler/rustc_infer/src/infer/mod.rs
View File

@ -306,12 +306,6 @@ pub struct InferCtxt<'tcx> {
// FIXME(matthewjasper) Merge into `tainted_by_errors`
err_count_on_creation: usize,
/// Track how many errors were stashed when this infcx is created.
/// Used for the same purpose as `err_count_on_creation`, even
/// though it's weaker because the count can go up and down.
// FIXME(matthewjasper) Merge into `tainted_by_errors`
stashed_err_count_on_creation: usize,
/// What is the innermost universe we have created? Starts out as
/// `UniverseIndex::root()` but grows from there as we enter
/// universal quantifiers.
@ -717,7 +711,6 @@ impl<'tcx> InferCtxtBuilder<'tcx> {
reported_signature_mismatch: Default::default(),
tainted_by_errors: Cell::new(None),
err_count_on_creation: tcx.dcx().err_count_excluding_lint_errs(),
stashed_err_count_on_creation: tcx.dcx().stashed_err_count(),
universe: Cell::new(ty::UniverseIndex::ROOT),
intercrate,
next_trait_solver,
@ -1274,14 +1267,6 @@ impl<'tcx> InferCtxt<'tcx> {
let guar = self.dcx().has_errors().unwrap();
self.set_tainted_by_errors(guar);
Some(guar)
} else if self.dcx().stashed_err_count() > self.stashed_err_count_on_creation {
// Errors stashed since this infcx was made. Not entirely reliable
// because the count of stashed errors can go down. But without
// this case we get a moderate number of uninteresting and
// extraneous "type annotations needed" errors.
let guar = self.dcx().delayed_bug("tainted_by_errors: stashed bug awaiting emission");
self.set_tainted_by_errors(guar);
Some(guar)
} else {
None
}

14
compiler/rustc_lint/src/array_into_iter.rs
View File

@ -70,15 +70,11 @@ impl<'tcx> LateLintPass<'tcx> for ArrayIntoIter {
// Check if the method call actually calls the libcore
// `IntoIterator::into_iter`.
let trait_id = cx
.typeck_results()
.type_dependent_def_id(expr.hir_id)
.and_then(|did| cx.tcx.trait_of_item(did));
if trait_id.is_none()
|| !cx.tcx.is_diagnostic_item(sym::IntoIterator, trait_id.unwrap())
{
return;
}
let def_id = cx.typeck_results().type_dependent_def_id(expr.hir_id).unwrap();
match cx.tcx.trait_of_item(def_id) {
Some(trait_id) if cx.tcx.is_diagnostic_item(sym::IntoIterator, trait_id) => {}
_ => return,
};
// As this is a method call expression, we have at least one argument.
let receiver_ty = cx.typeck_results().expr_ty(receiver_arg);

18
compiler/rustc_middle/src/thir.rs
View File

@ -815,7 +815,9 @@ pub enum PatKind<'tcx> {
/// The boundaries must be of the same type and that type must be numeric.
#[derive(Clone, Debug, PartialEq, HashStable, TypeVisitable)]
pub struct PatRange<'tcx> {
/// Must not be `PosInfinity`.
pub lo: PatRangeBoundary<'tcx>,
/// Must not be `NegInfinity`.
pub hi: PatRangeBoundary<'tcx>,
#[type_visitable(ignore)]
pub end: RangeEnd,
@ -958,22 +960,6 @@ impl<'tcx> PatRangeBoundary<'tcx> {
Self::NegInfinity | Self::PosInfinity => None,
}
}
#[inline]
pub fn to_const(self, ty: Ty<'tcx>, tcx: TyCtxt<'tcx>) -> mir::Const<'tcx> {
match self {
Self::Finite(value) => value,
Self::NegInfinity => {
// Unwrap is ok because the type is known to be numeric.
let c = ty.numeric_min_val(tcx).unwrap();
mir::Const::from_ty_const(c, tcx)
}
Self::PosInfinity => {
// Unwrap is ok because the type is known to be numeric.
let c = ty.numeric_max_val(tcx).unwrap();
mir::Const::from_ty_const(c, tcx)
}
}
}
pub fn eval_bits(self, ty: Ty<'tcx>, tcx: TyCtxt<'tcx>, param_env: ty::ParamEnv<'tcx>) -> u128 {
match self {
Self::Finite(value) => value.eval_bits(tcx, param_env),

16
compiler/rustc_middle/src/ty/mod.rs
View File

@ -847,13 +847,15 @@ impl<'tcx> OpaqueHiddenType<'tcx> {
opaque_def_id: LocalDefId,
tcx: TyCtxt<'tcx>,
) -> Result<Diag<'tcx>, ErrorGuaranteed> {
if let Some(diag) = tcx
.sess
.dcx()
.steal_diagnostic(tcx.def_span(opaque_def_id), StashKey::OpaqueHiddenTypeMismatch)
{
diag.cancel();
}
// We used to cancel here for slightly better error messages, but
// cancelling stashed diagnostics is no longer allowed because it
// causes problems when tracking whether errors have actually
// occurred.
tcx.sess.dcx().try_steal_modify_and_emit_err(
tcx.def_span(opaque_def_id),
StashKey::OpaqueHiddenTypeMismatch,
|_err| {},
);
(self.ty, other.ty).error_reported()?;
// Found different concrete types for the opaque type.
let sub_diag = if self.span == other.span {

4
compiler/rustc_middle/src/ty/region.rs
View File

@ -91,8 +91,8 @@ impl<'tcx> Region<'tcx> {
/// Constructs a `RegionKind::ReError` region.
#[track_caller]
pub fn new_error(tcx: TyCtxt<'tcx>, reported: ErrorGuaranteed) -> Region<'tcx> {
tcx.intern_region(ty::ReError(reported))
pub fn new_error(tcx: TyCtxt<'tcx>, guar: ErrorGuaranteed) -> Region<'tcx> {
tcx.intern_region(ty::ReError(guar))
}
/// Constructs a `RegionKind::ReError` region and registers a delayed bug to ensure it gets

4
compiler/rustc_middle/src/ty/sty.rs
View File

@ -1528,8 +1528,8 @@ impl<'tcx> Ty<'tcx> {
}
/// Constructs a `TyKind::Error` type with current `ErrorGuaranteed`
pub fn new_error(tcx: TyCtxt<'tcx>, reported: ErrorGuaranteed) -> Ty<'tcx> {
Ty::new(tcx, Error(reported))
pub fn new_error(tcx: TyCtxt<'tcx>, guar: ErrorGuaranteed) -> Ty<'tcx> {
Ty::new(tcx, Error(guar))
}
/// Constructs a `TyKind::Error` type and registers a `span_delayed_bug` to ensure it gets used.

54
compiler/rustc_mir_build/src/build/matches/test.rs
View File

@ -291,33 +291,41 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
}
TestKind::Range(ref range) => {
let lower_bound_success = self.cfg.start_new_block();
// Test `val` by computing `lo <= val && val <= hi`, using primitive comparisons.
// FIXME: skip useless comparison when the range is half-open.
let lo = range.lo.to_const(range.ty, self.tcx);
let hi = range.hi.to_const(range.ty, self.tcx);
let lo = self.literal_operand(test.span, lo);
let hi = self.literal_operand(test.span, hi);
let val = Operand::Copy(place);
let [success, fail] = *target_blocks else {
bug!("`TestKind::Range` should have two target blocks");
};
self.compare(
block,
lower_bound_success,
fail,
source_info,
BinOp::Le,
lo,
val.clone(),
);
let op = match range.end {
RangeEnd::Included => BinOp::Le,
RangeEnd::Excluded => BinOp::Lt,
// Test `val` by computing `lo <= val && val <= hi`, using primitive comparisons.
let val = Operand::Copy(place);
let intermediate_block = if !range.lo.is_finite() {
block
} else if !range.hi.is_finite() {
success
} else {
self.cfg.start_new_block()
};
self.compare(lower_bound_success, success, fail, source_info, op, val, hi);
if let Some(lo) = range.lo.as_finite() {
let lo = self.literal_operand(test.span, lo);
self.compare(
block,
intermediate_block,
fail,
source_info,
BinOp::Le,
lo,
val.clone(),
);
};
if let Some(hi) = range.hi.as_finite() {
let hi = self.literal_operand(test.span, hi);
let op = match range.end {
RangeEnd::Included => BinOp::Le,
RangeEnd::Excluded => BinOp::Lt,
};
self.compare(intermediate_block, success, fail, source_info, op, val, hi);
}
}
TestKind::Len { len, op } => {

29
compiler/rustc_parse/src/parser/expr.rs
View File

@ -1762,24 +1762,25 @@ impl<'a> Parser<'a> {
err: impl FnOnce(&Self) -> Diag<'a>,
) -> L {
assert!(could_be_unclosed_char_literal(ident));
if let Some(diag) = self.dcx().steal_diagnostic(ident.span, StashKey::LifetimeIsChar) {
diag.with_span_suggestion_verbose(
ident.span.shrink_to_hi(),
"add `'` to close the char literal",
"'",
Applicability::MaybeIncorrect,
)
.emit();
} else {
err(self)
.with_span_suggestion_verbose(
self.dcx()
.try_steal_modify_and_emit_err(ident.span, StashKey::LifetimeIsChar, |err| {
err.span_suggestion_verbose(
ident.span.shrink_to_hi(),
"add `'` to close the char literal",
"'",
Applicability::MaybeIncorrect,
)
.emit();
}
);
})
.unwrap_or_else(|| {
err(self)
.with_span_suggestion_verbose(
ident.span.shrink_to_hi(),
"add `'` to close the char literal",
"'",
Applicability::MaybeIncorrect,
)
.emit()
});
let name = ident.without_first_quote().name;
mk_lit_char(name, ident.span)
}

20
compiler/rustc_passes/src/check_attr.rs
View File

@ -2520,14 +2520,6 @@ fn check_invalid_crate_level_attr(tcx: TyCtxt<'_>, attrs: &[Attribute]) {
if attr.style == AttrStyle::Inner {
for attr_to_check in ATTRS_TO_CHECK {
if attr.has_name(*attr_to_check) {
if let AttrKind::Normal(ref p) = attr.kind
&& let Some(diag) = tcx.dcx().steal_diagnostic(
p.item.path.span,
StashKey::UndeterminedMacroResolution,
)
{
diag.cancel();
}
let item = tcx
.hir()
.items()
@ -2537,7 +2529,7 @@ fn check_invalid_crate_level_attr(tcx: TyCtxt<'_>, attrs: &[Attribute]) {
span: item.ident.span,
kind: item.kind.descr(),
});
tcx.dcx().emit_err(errors::InvalidAttrAtCrateLevel {
let err = tcx.dcx().create_err(errors::InvalidAttrAtCrateLevel {
span: attr.span,
sugg_span: tcx
.sess
@ -2553,6 +2545,16 @@ fn check_invalid_crate_level_attr(tcx: TyCtxt<'_>, attrs: &[Attribute]) {
name: *attr_to_check,
item,
});
if let AttrKind::Normal(ref p) = attr.kind {
tcx.dcx().try_steal_replace_and_emit_err(
p.item.path.span,
StashKey::UndeterminedMacroResolution,
err,
);
} else {
err.emit();
}
}
}
}

6
compiler/rustc_pattern_analysis/src/constructor.rs
View File

@ -688,6 +688,9 @@ pub enum Constructor<Cx: TypeCx> {
/// Fake extra constructor for constructors that are not seen in the matrix, as explained at the
/// top of the file.
Missing,
/// Fake extra constructor that indicates and empty field that is private. When we encounter one
/// we skip the column entirely so we don't observe its emptiness. Only used for specialization.
PrivateUninhabited,
}
impl<Cx: TypeCx> Clone for Constructor<Cx> {
@ -709,6 +712,7 @@ impl<Cx: TypeCx> Clone for Constructor<Cx> {
Constructor::NonExhaustive => Constructor::NonExhaustive,
Constructor::Hidden => Constructor::Hidden,
Constructor::Missing => Constructor::Missing,
Constructor::PrivateUninhabited => Constructor::PrivateUninhabited,
}
}
}
@ -763,6 +767,8 @@ impl<Cx: TypeCx> Constructor<Cx> {
}
// Wildcards cover anything
(_, Wildcard) => true,
// `PrivateUninhabited` skips everything.
(PrivateUninhabited, _) => true,
// Only a wildcard pattern can match these special constructors.
(Missing { .. } | NonExhaustive | Hidden, _) => false,

10
compiler/rustc_pattern_analysis/src/lib.rs
View File

@ -82,6 +82,11 @@ use crate::usefulness::{compute_match_usefulness, ValidityConstraint};
pub trait Captures<'a> {}
impl<'a, T: ?Sized> Captures<'a> for T {}
/// `bool` newtype that indicates whether this is a privately uninhabited field that we should skip
/// during analysis.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct PrivateUninhabitedField(pub bool);
/// Context that provides type information about constructors.
///
/// Most of the crate is parameterized on a type that implements this trait.
@ -105,13 +110,12 @@ pub trait TypeCx: Sized + fmt::Debug {
/// The number of fields for this constructor.
fn ctor_arity(&self, ctor: &Constructor<Self>, ty: &Self::Ty) -> usize;
/// The types of the fields for this constructor. The result must have a length of
/// `ctor_arity()`.
/// The types of the fields for this constructor. The result must contain `ctor_arity()` fields.
fn ctor_sub_tys<'a>(
&'a self,
ctor: &'a Constructor<Self>,
ty: &'a Self::Ty,
) -> impl Iterator<Item = Self::Ty> + ExactSizeIterator + Captures<'a>;
) -> impl Iterator<Item = (Self::Ty, PrivateUninhabitedField)> + ExactSizeIterator + Captures<'a>;
/// The set of all the constructors for `ty`.
///

19
compiler/rustc_pattern_analysis/src/pat.rs
View File

@ -5,7 +5,7 @@ use std::fmt;
use smallvec::{smallvec, SmallVec};
use crate::constructor::{Constructor, Slice, SliceKind};
use crate::TypeCx;
use crate::{PrivateUninhabitedField, TypeCx};
use self::Constructor::*;
@ -23,11 +23,6 @@ impl PatId {
/// Values and patterns can be represented as a constructor applied to some fields. This represents
/// a pattern in this form. A `DeconstructedPat` will almost always come from user input; the only
/// exception are some `Wildcard`s introduced during pattern lowering.
///
/// Note that the number of fields may not match the fields declared in the original struct/variant.
/// This happens if a private or `non_exhaustive` field is uninhabited, because the code mustn't
/// observe that it is uninhabited. In that case that field is not included in `fields`. Care must
/// be taken when converting to/from `thir::Pat`.
pub struct DeconstructedPat<Cx: TypeCx> {
ctor: Constructor<Cx>,
fields: Vec<DeconstructedPat<Cx>>,
@ -84,6 +79,8 @@ impl<Cx: TypeCx> DeconstructedPat<Cx> {
match (&self.ctor, other_ctor) {
// Return a wildcard for each field of `other_ctor`.
(Wildcard, _) => wildcard_sub_tys(),
// Skip this column.
(_, PrivateUninhabited) => smallvec![],
// The only non-trivial case: two slices of different arity. `other_slice` is
// guaranteed to have a larger arity, so we fill the middle part with enough
// wildcards to reach the length of the new, larger slice.
@ -192,7 +189,9 @@ impl<Cx: TypeCx> fmt::Debug for DeconstructedPat<Cx> {
}
Ok(())
}
Wildcard | Missing { .. } | NonExhaustive | Hidden => write!(f, "_ : {:?}", pat.ty()),
Wildcard | Missing | NonExhaustive | Hidden | PrivateUninhabited => {
write!(f, "_ : {:?}", pat.ty())
}
}
}
}
@ -300,7 +299,11 @@ impl<Cx: TypeCx> WitnessPat<Cx> {
/// For example, if `ctor` is a `Constructor::Variant` for `Option::Some`, we get the pattern
/// `Some(_)`.
pub(crate) fn wild_from_ctor(cx: &Cx, ctor: Constructor<Cx>, ty: Cx::Ty) -> Self {
let fields = cx.ctor_sub_tys(&ctor, &ty).map(|ty| Self::wildcard(ty)).collect();
let fields = cx
.ctor_sub_tys(&ctor, &ty)
.filter(|(_, PrivateUninhabitedField(skip))| !skip)
.map(|(ty, _)| Self::wildcard(ty))
.collect();
Self::new(ctor, fields, ty)
}

124
compiler/rustc_pattern_analysis/src/rustc.rs
View File

@ -10,7 +10,7 @@ use rustc_middle::mir::interpret::Scalar;
use rustc_middle::mir::{self, Const};
use rustc_middle::thir::{FieldPat, Pat, PatKind, PatRange, PatRangeBoundary};
use rustc_middle::ty::layout::IntegerExt;
use rustc_middle::ty::{self, OpaqueTypeKey, Ty, TyCtxt, TypeVisitableExt, VariantDef};
use rustc_middle::ty::{self, FieldDef, OpaqueTypeKey, Ty, TyCtxt, TypeVisitableExt, VariantDef};
use rustc_session::lint;
use rustc_span::{ErrorGuaranteed, Span, DUMMY_SP};
use rustc_target::abi::{FieldIdx, Integer, VariantIdx, FIRST_VARIANT};
@ -18,7 +18,7 @@ use rustc_target::abi::{FieldIdx, Integer, VariantIdx, FIRST_VARIANT};
use crate::constructor::{
IntRange, MaybeInfiniteInt, OpaqueId, RangeEnd, Slice, SliceKind, VariantVisibility,
};
use crate::{errors, Captures, TypeCx};
use crate::{errors, Captures, PrivateUninhabitedField, TypeCx};
use crate::constructor::Constructor::*;
@ -158,34 +158,19 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
}
}
// In the cases of either a `#[non_exhaustive]` field list or a non-public field, we hide
// uninhabited fields in order not to reveal the uninhabitedness of the whole variant.
// This lists the fields we keep along with their types.
pub(crate) fn list_variant_nonhidden_fields(
pub(crate) fn variant_sub_tys(
&self,
ty: RevealedTy<'tcx>,
variant: &'tcx VariantDef,
) -> impl Iterator<Item = (FieldIdx, RevealedTy<'tcx>)> + Captures<'p> + Captures<'_> {
let cx = self;
let ty::Adt(adt, args) = ty.kind() else { bug!() };
// Whether we must not match the fields of this variant exhaustively.
let is_non_exhaustive = variant.is_field_list_non_exhaustive() && !adt.did().is_local();
variant.fields.iter().enumerate().filter_map(move |(i, field)| {
let ty = field.ty(cx.tcx, args);
) -> impl Iterator<Item = (&'tcx FieldDef, RevealedTy<'tcx>)> + Captures<'p> + Captures<'_>
{
let ty::Adt(_, args) = ty.kind() else { bug!() };
variant.fields.iter().map(move |field| {
let ty = field.ty(self.tcx, args);
// `field.ty()` doesn't normalize after instantiating.
let ty = cx.tcx.normalize_erasing_regions(cx.param_env, ty);
let is_visible = adt.is_enum() || field.vis.is_accessible_from(cx.module, cx.tcx);
let is_uninhabited = (cx.tcx.features().exhaustive_patterns
|| cx.tcx.features().min_exhaustive_patterns)
&& cx.is_uninhabited(ty);
if is_uninhabited && (!is_visible || is_non_exhaustive) {
None
} else {
let ty = cx.reveal_opaque_ty(ty);
Some((FieldIdx::new(i), ty))
}
let ty = self.tcx.normalize_erasing_regions(self.param_env, ty);
let ty = self.reveal_opaque_ty(ty);
(field, ty)
})
}
@ -210,12 +195,17 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
&'a self,
ctor: &'a Constructor<'p, 'tcx>,
ty: RevealedTy<'tcx>,
) -> impl Iterator<Item = RevealedTy<'tcx>> + ExactSizeIterator + Captures<'a> {
) -> impl Iterator<Item = (RevealedTy<'tcx>, PrivateUninhabitedField)>
+ ExactSizeIterator
+ Captures<'a> {
fn reveal_and_alloc<'a, 'tcx>(
cx: &'a RustcMatchCheckCtxt<'_, 'tcx>,
iter: impl Iterator<Item = Ty<'tcx>>,
) -> &'a [RevealedTy<'tcx>] {
cx.dropless_arena.alloc_from_iter(iter.map(|ty| cx.reveal_opaque_ty(ty)))
) -> &'a [(RevealedTy<'tcx>, PrivateUninhabitedField)] {
cx.dropless_arena.alloc_from_iter(
iter.map(|ty| cx.reveal_opaque_ty(ty))
.map(|ty| (ty, PrivateUninhabitedField(false))),
)
}
let cx = self;
let slice = match ctor {
@ -229,7 +219,21 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
} else {
let variant =
&adt.variant(RustcMatchCheckCtxt::variant_index_for_adt(&ctor, *adt));
let tys = cx.list_variant_nonhidden_fields(ty, variant).map(|(_, ty)| ty);
// In the cases of either a `#[non_exhaustive]` field list or a non-public
// field, we skip uninhabited fields in order not to reveal the
// uninhabitedness of the whole variant.
let is_non_exhaustive =
variant.is_field_list_non_exhaustive() && !adt.did().is_local();
let tys = cx.variant_sub_tys(ty, variant).map(|(field, ty)| {
let is_visible =
adt.is_enum() || field.vis.is_accessible_from(cx.module, cx.tcx);
let is_uninhabited = (cx.tcx.features().exhaustive_patterns
|| cx.tcx.features().min_exhaustive_patterns)
&& cx.is_uninhabited(*ty);
let skip = is_uninhabited && (!is_visible || is_non_exhaustive);
(ty, PrivateUninhabitedField(skip))
});
cx.dropless_arena.alloc_from_iter(tys)
}
}
@ -246,16 +250,8 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
}
_ => bug!("bad slice pattern {:?} {:?}", ctor, ty),
},
Bool(..)
| IntRange(..)
| F32Range(..)
| F64Range(..)
| Str(..)
| Opaque(..)
| NonExhaustive
| Hidden
| Missing { .. }
| Wildcard => &[],
Bool(..) | IntRange(..) | F32Range(..) | F64Range(..) | Str(..) | Opaque(..)
| NonExhaustive | Hidden | Missing | PrivateUninhabited | Wildcard => &[],
Or => {
bug!("called `Fields::wildcards` on an `Or` ctor")
}
@ -274,25 +270,16 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
// patterns. If we're here we can assume this is a box pattern.
1
} else {
let variant =
&adt.variant(RustcMatchCheckCtxt::variant_index_for_adt(&ctor, *adt));
self.list_variant_nonhidden_fields(ty, variant).count()
let variant_idx = RustcMatchCheckCtxt::variant_index_for_adt(&ctor, *adt);
adt.variant(variant_idx).fields.len()
}
}
_ => bug!("Unexpected type for constructor `{ctor:?}`: {ty:?}"),
},
Ref => 1,
Slice(slice) => slice.arity(),
Bool(..)
| IntRange(..)
| F32Range(..)
| F64Range(..)
| Str(..)
| Opaque(..)
| NonExhaustive
| Hidden
| Missing { .. }
| Wildcard => 0,
Bool(..) | IntRange(..) | F32Range(..) | F64Range(..) | Str(..) | Opaque(..)
| NonExhaustive | Hidden | Missing | PrivateUninhabited | Wildcard => 0,
Or => bug!("The `Or` constructor doesn't have a fixed arity"),
}
}
@ -520,20 +507,12 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
};
let variant =
&adt.variant(RustcMatchCheckCtxt::variant_index_for_adt(&ctor, *adt));
// For each field in the variant, we store the relevant index into `self.fields` if any.
let mut field_id_to_id: Vec<Option<usize>> =
(0..variant.fields.len()).map(|_| None).collect();
let tys = cx.list_variant_nonhidden_fields(ty, variant).enumerate().map(
|(i, (field, ty))| {
field_id_to_id[field.index()] = Some(i);
ty
},
);
fields = tys.map(|ty| DeconstructedPat::wildcard(ty)).collect();
fields = cx
.variant_sub_tys(ty, variant)
.map(|(_, ty)| DeconstructedPat::wildcard(ty))
.collect();
for pat in subpatterns {
if let Some(i) = field_id_to_id[pat.field.index()] {
fields[i] = self.lower_pat(&pat.pattern);
}
fields[pat.field.index()] = self.lower_pat(&pat.pattern);
}
}
_ => bug!("pattern has unexpected type: pat: {:?}, ty: {:?}", pat, ty),
@ -775,11 +754,9 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
ty::Adt(adt_def, args) => {
let variant_index =
RustcMatchCheckCtxt::variant_index_for_adt(&pat.ctor(), *adt_def);
let variant = &adt_def.variant(variant_index);
let subpatterns = cx
.list_variant_nonhidden_fields(*pat.ty(), variant)
.zip(subpatterns)
.map(|((field, _ty), pattern)| FieldPat { field, pattern })
let subpatterns = subpatterns
.enumerate()
.map(|(i, pattern)| FieldPat { field: FieldIdx::new(i), pattern })
.collect();
if adt_def.is_enum() {
@ -830,7 +807,7 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
}
}
&Str(value) => PatKind::Constant { value },
Wildcard | NonExhaustive | Hidden => PatKind::Wild,
Wildcard | NonExhaustive | Hidden | PrivateUninhabited => PatKind::Wild,
Missing { .. } => bug!(
"trying to convert a `Missing` constructor into a `Pat`; this is probably a bug,
`Missing` should have been processed in `apply_constructors`"
@ -866,7 +843,8 @@ impl<'p, 'tcx: 'p> TypeCx for RustcMatchCheckCtxt<'p, 'tcx> {
&'a self,
ctor: &'a crate::constructor::Constructor<Self>,
ty: &'a Self::Ty,
) -> impl Iterator<Item = Self::Ty> + ExactSizeIterator + Captures<'a> {
) -> impl Iterator<Item = (Self::Ty, PrivateUninhabitedField)> + ExactSizeIterator + Captures<'a>
{
self.ctor_sub_tys(ctor, *ty)
}
fn ctors_for_ty(

27
compiler/rustc_pattern_analysis/src/usefulness.rs
View File

@ -716,7 +716,7 @@ use std::fmt;
use crate::constructor::{Constructor, ConstructorSet, IntRange};
use crate::pat::{DeconstructedPat, PatId, PatOrWild, WitnessPat};
use crate::{Captures, MatchArm, TypeCx};
use crate::{Captures, MatchArm, PrivateUninhabitedField, TypeCx};
use self::ValidityConstraint::*;
@ -817,6 +817,9 @@ impl fmt::Display for ValidityConstraint {
struct PlaceInfo<Cx: TypeCx> {
/// The type of the place.
ty: Cx::Ty,
/// Whether the place is a private uninhabited field. If so we skip this field during analysis
/// so that we don't observe its emptiness.
private_uninhabited: bool,
/// Whether the place is known to contain valid data.
validity: ValidityConstraint,
/// Whether the place is the scrutinee itself or a subplace of it.
@ -833,8 +836,9 @@ impl<Cx: TypeCx> PlaceInfo<Cx> {
) -> impl Iterator<Item = Self> + ExactSizeIterator + Captures<'a> {
let ctor_sub_tys = cx.ctor_sub_tys(ctor, &self.ty);
let ctor_sub_validity = self.validity.specialize(ctor);
ctor_sub_tys.map(move |ty| PlaceInfo {
ctor_sub_tys.map(move |(ty, PrivateUninhabitedField(private_uninhabited))| PlaceInfo {
ty,
private_uninhabited,
validity: ctor_sub_validity,
is_scrutinee: false,
})
@ -856,6 +860,11 @@ impl<Cx: TypeCx> PlaceInfo<Cx> {
where
Cx: 'a,
{
if self.private_uninhabited {
// Skip the whole column
return Ok((smallvec![Constructor::PrivateUninhabited], vec![]));
}
let ctors_for_ty = cx.ctors_for_ty(&self.ty)?;
// We treat match scrutinees of type `!` or `EmptyEnum` differently.
@ -914,7 +923,12 @@ impl<Cx: TypeCx> PlaceInfo<Cx> {
impl<Cx: TypeCx> Clone for PlaceInfo<Cx> {
fn clone(&self) -> Self {
Self { ty: self.ty.clone(), validity: self.validity, is_scrutinee: self.is_scrutinee }
Self {
ty: self.ty.clone(),
private_uninhabited: self.private_uninhabited,
validity: self.validity,
is_scrutinee: self.is_scrutinee,
}
}
}
@ -1121,7 +1135,12 @@ impl<'p, Cx: TypeCx> Matrix<'p, Cx> {
scrut_ty: Cx::Ty,
scrut_validity: ValidityConstraint,
) -> Self {
let place_info = PlaceInfo { ty: scrut_ty, validity: scrut_validity, is_scrutinee: true };
let place_info = PlaceInfo {
ty: scrut_ty,
private_uninhabited: false,
validity: scrut_validity,
is_scrutinee: true,
};
let mut matrix = Matrix {
rows: Vec::with_capacity(arms.len()),
place_info: smallvec![place_info],

5
compiler/rustc_privacy/src/lib.rs
View File

@ -988,10 +988,7 @@ impl<'tcx> Visitor<'tcx> for NamePrivacyVisitor<'tcx> {
fn visit_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) {
if let hir::ExprKind::Struct(qpath, fields, ref base) = expr.kind {
let res = self.typeck_results().qpath_res(qpath, expr.hir_id);
let Some(adt) = self.typeck_results().expr_ty(expr).ty_adt_def() else {
self.tcx.dcx().span_delayed_bug(expr.span, "no adt_def for expression");
return;
};
let adt = self.typeck_results().expr_ty(expr).ty_adt_def().unwrap();
let variant = adt.variant_of_res(res);
if let Some(base) = *base {
// If the expression uses FRU we need to make sure all the unmentioned fields

3
compiler/rustc_query_system/src/query/plumbing.rs
View File

@ -149,8 +149,7 @@ where
let guar = if let Some(root) = cycle_error.cycle.first()
&& let Some(span) = root.query.span
{
error.stash(span, StashKey::Cycle);
qcx.dep_context().sess().dcx().span_delayed_bug(span, "delayed cycle error")
error.stash(span, StashKey::Cycle).unwrap()
} else {
error.emit()
};

22
compiler/rustc_session/src/parse.rs
View File

@ -13,9 +13,10 @@ use crate::Session;
use rustc_ast::node_id::NodeId;
use rustc_data_structures::fx::{FxHashMap, FxIndexMap, FxIndexSet};
use rustc_data_structures::sync::{AppendOnlyVec, Lock, Lrc};
use rustc_errors::{emitter::SilentEmitter, DiagCtxt};
use rustc_errors::emitter::{stderr_destination, HumanEmitter, SilentEmitter};
use rustc_errors::{
fallback_fluent_bundle, Diag, DiagnosticMessage, EmissionGuarantee, MultiSpan, StashKey,
fallback_fluent_bundle, ColorConfig, Diag, DiagCtxt, DiagnosticMessage, EmissionGuarantee,
MultiSpan, StashKey,
};
use rustc_feature::{find_feature_issue, GateIssue, UnstableFeatures};
use rustc_span::edition::Edition;
@ -105,8 +106,7 @@ pub fn feature_err_issue(
// Cancel an earlier warning for this same error, if it exists.
if let Some(span) = span.primary_span() {
if let Some(err) = sess.parse_sess.dcx.steal_diagnostic(span, StashKey::EarlySyntaxWarning)
{
if let Some(err) = sess.parse_sess.dcx.steal_non_err(span, StashKey::EarlySyntaxWarning) {
err.cancel()
}
}
@ -236,7 +236,11 @@ impl ParseSess {
pub fn new(locale_resources: Vec<&'static str>, file_path_mapping: FilePathMapping) -> Self {
let fallback_bundle = fallback_fluent_bundle(locale_resources, false);
let sm = Lrc::new(SourceMap::new(file_path_mapping));
let dcx = DiagCtxt::with_tty_emitter(Some(sm.clone()), fallback_bundle);
let emitter = Box::new(
HumanEmitter::new(stderr_destination(ColorConfig::Auto), fallback_bundle)
.sm(Some(sm.clone())),
);
let dcx = DiagCtxt::new(emitter);
ParseSess::with_dcx(dcx, sm)
}
@ -265,9 +269,11 @@ impl ParseSess {
pub fn with_silent_emitter(fatal_note: String) -> Self {
let fallback_bundle = fallback_fluent_bundle(Vec::new(), false);
let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
let fatal_dcx = DiagCtxt::with_tty_emitter(None, fallback_bundle).disable_warnings();
let dcx = DiagCtxt::with_emitter(Box::new(SilentEmitter { fatal_dcx, fatal_note }))
.disable_warnings();
let emitter =
Box::new(HumanEmitter::new(stderr_destination(ColorConfig::Auto), fallback_bundle));
let fatal_dcx = DiagCtxt::new(emitter);
let dcx =
DiagCtxt::new(Box::new(SilentEmitter { fatal_dcx, fatal_note })).disable_warnings();
ParseSess::with_dcx(dcx, sm)
}

48
compiler/rustc_session/src/session.rs
View File

@ -18,7 +18,7 @@ use rustc_data_structures::sync::{
AtomicU64, DynSend, DynSync, Lock, Lrc, MappedReadGuard, ReadGuard, RwLock,
};
use rustc_errors::annotate_snippet_emitter_writer::AnnotateSnippetEmitter;
use rustc_errors::emitter::{DynEmitter, HumanEmitter, HumanReadableErrorType};
use rustc_errors::emitter::{stderr_destination, DynEmitter, HumanEmitter, HumanReadableErrorType};
use rustc_errors::json::JsonEmitter;
use rustc_errors::registry::Registry;
use rustc_errors::{
@ -28,7 +28,7 @@ use rustc_errors::{
use rustc_macros::HashStable_Generic;
pub use rustc_span::def_id::StableCrateId;
use rustc_span::edition::Edition;
use rustc_span::source_map::{FileLoader, RealFileLoader, SourceMap};
use rustc_span::source_map::{FileLoader, FilePathMapping, RealFileLoader, SourceMap};
use rustc_span::{SourceFileHashAlgorithm, Span, Symbol};
use rustc_target::asm::InlineAsmArch;
use rustc_target::spec::{CodeModel, PanicStrategy, RelocModel, RelroLevel};
@ -39,6 +39,7 @@ use rustc_target::spec::{
use std::any::Any;
use std::env;
use std::fmt;
use std::io;
use std::ops::{Div, Mul};
use std::path::{Path, PathBuf};
use std::str::FromStr;
@ -982,7 +983,7 @@ fn default_emitter(
);
Box::new(emitter.ui_testing(sopts.unstable_opts.ui_testing))
} else {
let emitter = HumanEmitter::stderr(color_config, fallback_bundle)
let emitter = HumanEmitter::new(stderr_destination(color_config), fallback_bundle)
.fluent_bundle(bundle)
.sm(Some(source_map))
.short_message(short)
@ -998,22 +999,23 @@ fn default_emitter(
}
}
config::ErrorOutputType::Json { pretty, json_rendered } => Box::new(
JsonEmitter::stderr(
Some(registry),
JsonEmitter::new(
Box::new(io::BufWriter::new(io::stderr())),
source_map,
bundle,
fallback_bundle,
pretty,
json_rendered,
sopts.diagnostic_width,
macro_backtrace,
track_diagnostics,
terminal_url,
)
.registry(Some(registry))
.fluent_bundle(bundle)
.ui_testing(sopts.unstable_opts.ui_testing)
.ignored_directories_in_source_blocks(
sopts.unstable_opts.ignore_directory_in_diagnostics_source_blocks.clone(),
),
)
.diagnostic_width(sopts.diagnostic_width)
.macro_backtrace(macro_backtrace)
.track_diagnostics(track_diagnostics)
.terminal_url(terminal_url),
),
}
}
@ -1080,8 +1082,8 @@ pub fn build_session(
);
let emitter = default_emitter(&sopts, registry, source_map.clone(), bundle, fallback_bundle);
let mut dcx = DiagCtxt::with_emitter(emitter)
.with_flags(sopts.unstable_opts.dcx_flags(can_emit_warnings));
let mut dcx =
DiagCtxt::new(emitter).with_flags(sopts.unstable_opts.dcx_flags(can_emit_warnings));
if let Some(ice_file) = ice_file {
dcx = dcx.with_ice_file(ice_file);
}
@ -1402,7 +1404,7 @@ pub struct EarlyDiagCtxt {
impl EarlyDiagCtxt {
pub fn new(output: ErrorOutputType) -> Self {
let emitter = mk_emitter(output);
Self { dcx: DiagCtxt::with_emitter(emitter) }
Self { dcx: DiagCtxt::new(emitter) }
}
/// Swap out the underlying dcx once we acquire the user's preference on error emission
@ -1412,7 +1414,7 @@ impl EarlyDiagCtxt {
self.dcx.abort_if_errors();
let emitter = mk_emitter(output);
self.dcx = DiagCtxt::with_emitter(emitter);
self.dcx = DiagCtxt::new(emitter);
}
#[allow(rustc::untranslatable_diagnostic)]
@ -1473,17 +1475,17 @@ fn mk_emitter(output: ErrorOutputType) -> Box<DynEmitter> {
let emitter: Box<DynEmitter> = match output {
config::ErrorOutputType::HumanReadable(kind) => {
let (short, color_config) = kind.unzip();
Box::new(HumanEmitter::stderr(color_config, fallback_bundle).short_message(short))
Box::new(
HumanEmitter::new(stderr_destination(color_config), fallback_bundle)
.short_message(short),
)
}
config::ErrorOutputType::Json { pretty, json_rendered } => Box::new(JsonEmitter::basic(
config::ErrorOutputType::Json { pretty, json_rendered } => Box::new(JsonEmitter::new(
Box::new(io::BufWriter::new(io::stderr())),
Lrc::new(SourceMap::new(FilePathMapping::empty())),
fallback_bundle,
pretty,
json_rendered,
None,
fallback_bundle,
None,
false,
false,
TerminalUrl::No,
)),
};
emitter

3
compiler/rustc_target/src/spec/targets/x86_64_pc_windows_gnu.rs
View File

@ -3,6 +3,7 @@ use crate::spec::{base, Cc, LinkerFlavor, Lld, Target};
pub fn target() -> Target {
let mut base = base::windows_gnu::opts();
base.cpu = "x86-64".into();
base.features = "+cx16,+sse3,+sahf".into();
base.plt_by_default = false;
// Use high-entropy 64 bit address space for ASLR
base.add_pre_link_args(
@ -10,7 +11,7 @@ pub fn target() -> Target {
&["-m", "i386pep", "--high-entropy-va"],
);
base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m64", "-Wl,--high-entropy-va"]);
base.max_atomic_width = Some(64);
base.max_atomic_width = Some(128);
base.linker = Some("x86_64-w64-mingw32-gcc".into());
Target {

3
compiler/rustc_target/src/spec/targets/x86_64_pc_windows_gnullvm.rs
View File

@ -3,9 +3,10 @@ use crate::spec::{base, Cc, LinkerFlavor, Lld, Target};
pub fn target() -> Target {
let mut base = base::windows_gnullvm::opts();
base.cpu = "x86-64".into();
base.features = "+cx16,+sse3,+sahf".into();
base.plt_by_default = false;
base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m64"]);
base.max_atomic_width = Some(64);
base.max_atomic_width = Some(128);
base.linker = Some("x86_64-w64-mingw32-clang".into());
Target {

3
compiler/rustc_target/src/spec/targets/x86_64_pc_windows_msvc.rs
View File

@ -3,8 +3,9 @@ use crate::spec::{base, SanitizerSet, Target};
pub fn target() -> Target {
let mut base = base::windows_msvc::opts();
base.cpu = "x86-64".into();
base.features = "+cx16,+sse3,+sahf".into();
base.plt_by_default = false;
base.max_atomic_width = Some(64);
base.max_atomic_width = Some(128);
base.supported_sanitizers = SanitizerSet::ADDRESS;
Target {

3
compiler/rustc_target/src/spec/targets/x86_64_uwp_windows_gnu.rs
View File

@ -3,6 +3,7 @@ use crate::spec::{base, Cc, LinkerFlavor, Lld, Target};
pub fn target() -> Target {
let mut base = base::windows_uwp_gnu::opts();
base.cpu = "x86-64".into();
base.features = "+cx16,+sse3,+sahf".into();
base.plt_by_default = false;
// Use high-entropy 64 bit address space for ASLR
base.add_pre_link_args(
@ -10,7 +11,7 @@ pub fn target() -> Target {
&["-m", "i386pep", "--high-entropy-va"],
);
base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m64", "-Wl,--high-entropy-va"]);
base.max_atomic_width = Some(64);
base.max_atomic_width = Some(128);
Target {
llvm_target: "x86_64-pc-windows-gnu".into(),

3
compiler/rustc_target/src/spec/targets/x86_64_uwp_windows_msvc.rs
View File

@ -3,8 +3,9 @@ use crate::spec::{base, Target};
pub fn target() -> Target {
let mut base = base::windows_uwp_msvc::opts();
base.cpu = "x86-64".into();
base.features = "+cx16,+sse3,+sahf".into();
base.plt_by_default = false;
base.max_atomic_width = Some(64);
base.max_atomic_width = Some(128);
Target {
llvm_target: "x86_64-pc-windows-msvc".into(),

18
compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
View File

@ -889,7 +889,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
}
}
SelectionError::OpaqueTypeAutoTraitLeakageUnknown(def_id) => self.report_opaque_type_auto_trait_leakage(
SelectionError::OpaqueTypeAutoTraitLeakageUnknown(def_id) => return self.report_opaque_type_auto_trait_leakage(
&obligation,
def_id,
),
@ -2252,8 +2252,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
ErrorCode::E0282,
false,
);
err.stash(span, StashKey::MaybeForgetReturn);
return self.dcx().delayed_bug("stashed error never reported");
return err.stash(span, StashKey::MaybeForgetReturn).unwrap();
}
Some(e) => return e,
}
@ -2766,7 +2765,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
self.suggest_unsized_bound_if_applicable(err, obligation);
if let Some(span) = err.span.primary_span()
&& let Some(mut diag) =
self.tcx.dcx().steal_diagnostic(span, StashKey::AssociatedTypeSuggestion)
self.tcx.dcx().steal_non_err(span, StashKey::AssociatedTypeSuggestion)
&& let Ok(ref mut s1) = err.suggestions
&& let Ok(ref mut s2) = diag.suggestions
{
@ -3291,7 +3290,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
&self,
obligation: &PredicateObligation<'tcx>,
def_id: DefId,
) -> Diag<'tcx> {
) -> ErrorGuaranteed {
let name = match self.tcx.opaque_type_origin(def_id.expect_local()) {
hir::OpaqueTyOrigin::FnReturn(_) | hir::OpaqueTyOrigin::AsyncFn(_) => {
"opaque type".to_string()
@ -3318,12 +3317,9 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
}
};
if let Some(diag) = self.dcx().steal_diagnostic(self.tcx.def_span(def_id), StashKey::Cycle)
{
diag.cancel();
}
err
self.note_obligation_cause(&mut err, &obligation);
self.point_at_returns_when_relevant(&mut err, &obligation);
self.dcx().try_steal_replace_and_emit_err(self.tcx.def_span(def_id), StashKey::Cycle, err)
}
fn report_signature_mismatch_error(

35
library/std/src/sys/pal/windows/thread_local_key.rs
View File

@ -1,7 +1,7 @@
use crate::cell::UnsafeCell;
use crate::ptr;
use crate::sync::atomic::{
AtomicBool, AtomicPtr, AtomicU32,
AtomicPtr, AtomicU32,
Ordering::{AcqRel, Acquire, Relaxed, Release},
};
use crate::sys::c;
@ -9,10 +9,6 @@ use crate::sys::c;
#[cfg(test)]
mod tests;
/// An optimization hint. The compiler is often smart enough to know if an atomic
/// is never set and can remove dead code based on that fact.
static HAS_DTORS: AtomicBool = AtomicBool::new(false);
// Using a per-thread list avoids the problems in synchronizing global state.
#[thread_local]
#[cfg(target_thread_local)]
@ -24,12 +20,11 @@ static DESTRUCTORS: crate::cell::RefCell<Vec<(*mut u8, unsafe extern "C" fn(*mut
#[inline(never)]
#[cfg(target_thread_local)]
pub unsafe fn register_keyless_dtor(t: *mut u8, dtor: unsafe extern "C" fn(*mut u8)) {
dtors_used();
match DESTRUCTORS.try_borrow_mut() {
Ok(mut dtors) => dtors.push((t, dtor)),
Err(_) => rtabort!("global allocator may not use TLS"),
}
HAS_DTORS.store(true, Relaxed);
}
#[inline(never)] // See comment above
@ -130,6 +125,7 @@ impl StaticKey {
#[cold]
unsafe fn init(&'static self) -> Key {
if self.dtor.is_some() {
dtors_used();
let mut pending = c::FALSE;
let r = c::InitOnceBeginInitialize(self.once.get(), 0, &mut pending, ptr::null_mut());
assert_eq!(r, c::TRUE);
@ -215,7 +211,6 @@ unsafe fn register_dtor(key: &'static StaticKey) {
Err(new) => head = new,
}
}
HAS_DTORS.store(true, Release);
}
// -------------------------------------------------------------------------
@ -281,17 +276,16 @@ unsafe fn register_dtor(key: &'static StaticKey) {
// the address of the symbol to ensure it sticks around.
#[link_section = ".CRT$XLB"]
#[allow(dead_code, unused_variables)]
#[used] // we don't want LLVM eliminating this symbol for any reason, and
// when the symbol makes it to the linker the linker will take over
pub static p_thread_callback: unsafe extern "system" fn(c::LPVOID, c::DWORD, c::LPVOID) =
on_tls_callback;
#[allow(dead_code, unused_variables)]
unsafe extern "system" fn on_tls_callback(h: c::LPVOID, dwReason: c::DWORD, pv: c::LPVOID) {
if !HAS_DTORS.load(Acquire) {
return;
}
fn dtors_used() {
// we don't want LLVM eliminating p_thread_callback when destructors are used.
// when the symbol makes it to the linker the linker will take over
unsafe { crate::intrinsics::volatile_load(&p_thread_callback) };
}
unsafe extern "system" fn on_tls_callback(_h: c::LPVOID, dwReason: c::DWORD, _pv: c::LPVOID) {
if dwReason == c::DLL_THREAD_DETACH || dwReason == c::DLL_PROCESS_DETACH {
#[cfg(not(target_thread_local))]
run_dtors();
@ -301,19 +295,16 @@ unsafe extern "system" fn on_tls_callback(h: c::LPVOID, dwReason: c::DWORD, pv:
// See comments above for what this is doing. Note that we don't need this
// trickery on GNU windows, just on MSVC.
reference_tls_used();
#[cfg(target_env = "msvc")]
unsafe fn reference_tls_used() {
#[cfg(all(target_env = "msvc", not(target_thread_local)))]
{
extern "C" {
static _tls_used: u8;
}
crate::intrinsics::volatile_load(&_tls_used);
}
#[cfg(not(target_env = "msvc"))]
unsafe fn reference_tls_used() {}
}
#[allow(dead_code)] // actually called below
#[cfg(not(target_thread_local))]
unsafe fn run_dtors() {
for _ in 0..5 {
let mut any_run = false;

21
src/librustdoc/core.rs
View File

@ -1,7 +1,7 @@
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::sync::Lrc;
use rustc_data_structures::unord::UnordSet;
use rustc_errors::emitter::{DynEmitter, HumanEmitter};
use rustc_errors::emitter::{stderr_destination, DynEmitter, HumanEmitter};
use rustc_errors::json::JsonEmitter;
use rustc_errors::{codes::*, ErrorGuaranteed, TerminalUrl};
use rustc_feature::UnstableFeatures;
@ -20,6 +20,7 @@ use rustc_span::symbol::sym;
use rustc_span::{source_map, Span};
use std::cell::RefCell;
use std::io;
use std::mem;
use std::rc::Rc;
use std::sync::LazyLock;
@ -141,7 +142,7 @@ pub(crate) fn new_dcx(
ErrorOutputType::HumanReadable(kind) => {
let (short, color_config) = kind.unzip();
Box::new(
HumanEmitter::stderr(color_config, fallback_bundle)
HumanEmitter::new(stderr_destination(color_config), fallback_bundle)
.sm(source_map.map(|sm| sm as _))
.short_message(short)
.teach(unstable_opts.teach)
@ -155,24 +156,22 @@ pub(crate) fn new_dcx(
Lrc::new(source_map::SourceMap::new(source_map::FilePathMapping::empty()))
});
Box::new(
JsonEmitter::stderr(
None,
JsonEmitter::new(
Box::new(io::BufWriter::new(io::stderr())),
source_map,
None,
fallback_bundle,
pretty,
json_rendered,
diagnostic_width,
false,
unstable_opts.track_diagnostics,
TerminalUrl::No,
)
.ui_testing(unstable_opts.ui_testing),
.ui_testing(unstable_opts.ui_testing)
.diagnostic_width(diagnostic_width)
.track_diagnostics(unstable_opts.track_diagnostics)
.terminal_url(TerminalUrl::No),
)
}
};
rustc_errors::DiagCtxt::with_emitter(emitter).with_flags(unstable_opts.dcx_flags(true))
rustc_errors::DiagCtxt::new(emitter).with_flags(unstable_opts.dcx_flags(true))
}
/// Parse, resolve, and typecheck the given crate.

11
src/librustdoc/doctest.rs
View File

@ -1,6 +1,7 @@
use rustc_ast as ast;
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::sync::Lrc;
use rustc_errors::emitter::stderr_destination;
use rustc_errors::{ColorConfig, ErrorGuaranteed, FatalError};
use rustc_hir::def_id::{LocalDefId, CRATE_DEF_ID, LOCAL_CRATE};
use rustc_hir::{self as hir, intravisit, CRATE_HIR_ID};
@ -576,14 +577,14 @@ pub(crate) fn make_test(
rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
false,
);
supports_color = HumanEmitter::stderr(ColorConfig::Auto, fallback_bundle.clone())
.diagnostic_width(Some(80))
.supports_color();
supports_color =
HumanEmitter::new(stderr_destination(ColorConfig::Auto), fallback_bundle.clone())
.supports_color();
let emitter = HumanEmitter::new(Box::new(io::sink()), fallback_bundle);
// FIXME(misdreavus): pass `-Z treat-err-as-bug` to the doctest parser
let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
let dcx = DiagCtxt::new(Box::new(emitter)).disable_warnings();
let sess = ParseSess::with_dcx(dcx, sm);
let mut found_main = false;
@ -768,7 +769,7 @@ fn check_if_attr_is_complete(source: &str, edition: Edition) -> bool {
let emitter = HumanEmitter::new(Box::new(io::sink()), fallback_bundle);
let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
let dcx = DiagCtxt::new(Box::new(emitter)).disable_warnings();
let sess = ParseSess::with_dcx(dcx, sm);
let mut parser =
match maybe_new_parser_from_source_str(&sess, filename, source.to_owned()) {

2
src/librustdoc/passes/lint/check_code_block_syntax.rs
View File

@ -42,7 +42,7 @@ fn check_rust_syntax(
let emitter = BufferEmitter { buffer: Lrc::clone(&buffer), fallback_bundle };
let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
let dcx = DiagCtxt::new(Box::new(emitter)).disable_warnings();
let source = dox[code_block.code].to_owned();
let sess = ParseSess::with_dcx(dcx, sm);

2
src/tools/clippy/clippy_lints/src/doc/needless_doctest_main.rs
View File

@ -45,7 +45,7 @@ pub fn check(
let fallback_bundle =
rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false);
let emitter = HumanEmitter::new(Box::new(io::sink()), fallback_bundle);
let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
let dcx = DiagCtxt::new(Box::new(emitter)).disable_warnings();
#[expect(clippy::arc_with_non_send_sync)] // `Lrc` is expected by with_dcx
let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
let sess = ParseSess::with_dcx(dcx, sm);

8
src/tools/clippy/tests/ui/crashes/unreachable-array-or-slice.rs Normal file
View File

@ -0,0 +1,8 @@
struct Foo(isize, isize, isize, isize);
pub fn main() {
let Self::anything_here_kills_it(a, b, ..) = Foo(5, 5, 5, 5);
match [5, 5, 5, 5] {
[..] => { }
}
}

9
src/tools/clippy/tests/ui/crashes/unreachable-array-or-slice.stderr Normal file
View File

@ -0,0 +1,9 @@
error[E0433]: failed to resolve: `Self` is only available in impls, traits, and type definitions
--> tests/ui/crashes/unreachable-array-or-slice.rs:4:9
|
LL | let Self::anything_here_kills_it(a, b, ..) = Foo(5, 5, 5, 5);
| ^^^^ `Self` is only available in impls, traits, and type definitions
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0433`.

2
src/tools/miri/src/bin/miri.rs
View File

@ -68,7 +68,7 @@ impl rustc_driver::Callbacks for MiriCompilerCalls {
queries: &'tcx rustc_interface::Queries<'tcx>,
) -> Compilation {
queries.global_ctxt().unwrap().enter(|tcx| {
if tcx.sess.dcx().has_errors().is_some() {
if tcx.sess.dcx().has_errors_or_delayed_bugs().is_some() {
tcx.dcx().fatal("miri cannot be run on programs that fail compilation");
}

21
src/tools/rustfmt/src/formatting.rs
View File

@ -109,7 +109,7 @@ fn format_project<T: FormatHandler>(
let main_file = input.file_name();
let input_is_stdin = main_file == FileName::Stdin;
let mut parse_session = ParseSess::new(config)?;
let parse_session = ParseSess::new(config)?;
if config.skip_children() && parse_session.ignore_file(&main_file) {
return Ok(FormatReport::new());
}
@ -118,20 +118,11 @@ fn format_project<T: FormatHandler>(
let mut report = FormatReport::new();
let directory_ownership = input.to_directory_ownership();
// rustfmt doesn't use `run_compiler` like other tools, so it must emit any
// stashed diagnostics itself, otherwise the `DiagCtxt` will assert when
// dropped. The final result here combines the parsing result and the
// `emit_stashed_diagnostics` result.
let parse_res = Parser::parse_crate(input, &parse_session);
let stashed_res = parse_session.emit_stashed_diagnostics();
let krate = match (parse_res, stashed_res) {
(Ok(krate), None) => krate,
(parse_res, _) => {
// Surface parse error via Session (errors are merged there from report).
let forbid_verbose = match parse_res {
Err(e) if e != ParserError::ParsePanicError => true,
_ => input_is_stdin,
};
let krate = match Parser::parse_crate(input, &parse_session) {
Ok(krate) => krate,
// Surface parse error via Session (errors are merged there from report)
Err(e) => {
let forbid_verbose = input_is_stdin || e != ParserError::ParsePanicError;
should_emit_verbose(forbid_verbose, config, || {
eprintln!("The Rust parser panicked");
});

19
src/tools/rustfmt/src/parse/session.rs
View File

@ -3,11 +3,9 @@ use std::path::Path;
use std::sync::atomic::{AtomicBool, Ordering};
use rustc_data_structures::sync::{IntoDynSyncSend, Lrc};
use rustc_errors::emitter::{DynEmitter, Emitter, HumanEmitter};
use rustc_errors::emitter::{stderr_destination, DynEmitter, Emitter, HumanEmitter};
use rustc_errors::translation::Translate;
use rustc_errors::{
ColorConfig, Diag, DiagCtxt, DiagInner, ErrorGuaranteed, Level as DiagnosticLevel,
};
use rustc_errors::{ColorConfig, Diag, DiagCtxt, DiagInner, Level as DiagnosticLevel};
use rustc_session::parse::ParseSess as RawParseSess;
use rustc_span::{
source_map::{FilePathMapping, SourceMap},
@ -152,9 +150,12 @@ fn default_dcx(
rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
false,
);
Box::new(HumanEmitter::stderr(emit_color, fallback_bundle).sm(Some(source_map.clone())))
Box::new(
HumanEmitter::new(stderr_destination(emit_color), fallback_bundle)
.sm(Some(source_map.clone())),
)
};
DiagCtxt::with_emitter(Box::new(SilentOnIgnoredFilesEmitter {
DiagCtxt::new(Box::new(SilentOnIgnoredFilesEmitter {
has_non_ignorable_parser_errors: false,
source_map,
emitter,
@ -230,12 +231,8 @@ impl ParseSess {
self.ignore_path_set.as_ref().is_match(path)
}
pub(crate) fn emit_stashed_diagnostics(&mut self) -> Option<ErrorGuaranteed> {
self.parse_sess.dcx.emit_stashed_diagnostics()
}
pub(crate) fn set_silent_emitter(&mut self) {
self.parse_sess.dcx = DiagCtxt::with_emitter(silent_emitter());
self.parse_sess.dcx = DiagCtxt::new(silent_emitter());
}
pub(crate) fn span_to_filename(&self, span: Span) -> FileName {

2
tests/codegen/sse42-implies-crc32.rs
View File

@ -12,4 +12,4 @@ pub unsafe fn crc32sse(v: u8) -> u32 {
_mm_crc32_u8(out, v)
}
// CHECK: attributes #0 {{.*"target-features"="\+sse4.2,\+crc32"}}
// CHECK: attributes #0 {{.*"target-features"=".*\+sse4.2,\+crc32"}}

4
tests/ui/foreign/stashed-issue-121451.rs Normal file
View File

@ -0,0 +1,4 @@
extern "C" fn _f() -> libc::uintptr_t {}
//~^ ERROR failed to resolve: use of undeclared crate or module `libc`
fn main() {}

9
tests/ui/foreign/stashed-issue-121451.stderr Normal file
View File

@ -0,0 +1,9 @@
error[E0433]: failed to resolve: use of undeclared crate or module `libc`
--> $DIR/stashed-issue-121451.rs:1:23
|
LL | extern "C" fn _f() -> libc::uintptr_t {}
| ^^^^ use of undeclared crate or module `libc`
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0433`.

13
tests/ui/impl-trait/stashed-diag-issue-121504.rs Normal file
View File

@ -0,0 +1,13 @@
//@ edition: 2021
trait MyTrait {
async fn foo(self) -> (Self, i32);
}
impl MyTrait for xyz::T { //~ ERROR failed to resolve: use of undeclared crate or module `xyz`
async fn foo(self, key: i32) -> (u32, i32) {
(self, key)
}
}
fn main() {}

9
tests/ui/impl-trait/stashed-diag-issue-121504.stderr Normal file
View File

@ -0,0 +1,9 @@
error[E0433]: failed to resolve: use of undeclared crate or module `xyz`
--> $DIR/stashed-diag-issue-121504.rs:7:18
|
LL | impl MyTrait for xyz::T {
| ^^^ use of undeclared crate or module `xyz`
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0433`.

2
tests/ui/lowering/issue-121108.rs
View File

@ -3,7 +3,7 @@
use std::ptr::addr_of;
const UNINHABITED_VARIANT: () = unsafe {
let v = *addr_of!(data).cast(); //~ ERROR cannot determine resolution for the macro `addr_of`
let v = *addr_of!(data).cast();
};
fn main() {}

10
tests/ui/lowering/issue-121108.stderr
View File

@ -13,13 +13,5 @@ LL - #![derive(Clone, Copy)]
LL + #[derive(Clone, Copy)]
|
error: cannot determine resolution for the macro `addr_of`
--> $DIR/issue-121108.rs:6:14
|
LL | let v = *addr_of!(data).cast();
| ^^^^^^^
|
= note: import resolution is stuck, try simplifying macro imports
error: aborting due to 2 previous errors
error: aborting due to 1 previous error

4
tests/ui/resolve/issue-111312.rs
View File

@ -7,5 +7,7 @@ trait Has {
trait HasNot {}
fn main() {
HasNot::has(); //~ ERROR
HasNot::has();
//~^ ERROR trait objects must include the `dyn` keyword
//~| ERROR no function or associated item named `has` found for trait `HasNot`
}

16
tests/ui/resolve/issue-111312.stderr
View File

@ -1,3 +1,14 @@
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/issue-111312.rs:10:5
|
LL | HasNot::has();
| ^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | <dyn HasNot>::has();
| ++++ +
error[E0599]: no function or associated item named `has` found for trait `HasNot`
--> $DIR/issue-111312.rs:10:13
|
@ -10,6 +21,7 @@ note: `Has` defines an item `has`
LL | trait Has {
| ^^^^^^^^^
error: aborting due to 1 previous error
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0599`.
Some errors have detailed explanations: E0599, E0782.
For more information about an error, try `rustc --explain E0599`.

4
tests/ui/resolve/issue-111727.rs
View File

@ -1,5 +1,7 @@
//@ edition: 2021
fn main() {
std::any::Any::create(); //~ ERROR
std::any::Any::create();
//~^ ERROR trait objects must include the `dyn` keyword
//~| ERROR no function or associated item named `create` found for trait `Any`
}

16
tests/ui/resolve/issue-111727.stderr
View File

@ -1,9 +1,21 @@
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/issue-111727.rs:4:5
|
LL | std::any::Any::create();
| ^^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | <dyn std::any::Any>::create();
| ++++ +
error[E0599]: no function or associated item named `create` found for trait `Any`
--> $DIR/issue-111727.rs:4:20
|
LL | std::any::Any::create();
| ^^^^^^ function or associated item not found in `Any`
error: aborting due to 1 previous error
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0599`.
Some errors have detailed explanations: E0599, E0782.
For more information about an error, try `rustc --explain E0599`.

1
tests/ui/type-alias-impl-trait/different_defining_uses_never_type-2.rs
View File

@ -11,6 +11,7 @@ fn foo<'a, 'b>() -> Tait<'a> {
}
let x: Tait<'a> = ();
x
//~^ ERROR concrete type differs from previous defining opaque type use
}
fn main() {}

14
tests/ui/type-alias-impl-trait/different_defining_uses_never_type-2.stderr
View File

@ -1,3 +1,15 @@
error: concrete type differs from previous defining opaque type use
--> $DIR/different_defining_uses_never_type-2.rs:13:5
|
LL | x
| ^ expected `i32`, got `()`
|
note: previous use here
--> $DIR/different_defining_uses_never_type-2.rs:8:31
|
LL | let y: Tait<'b> = 1i32;
| ^^^^
error: concrete type differs from previous defining opaque type use
--> $DIR/different_defining_uses_never_type-2.rs:8:31
|
@ -10,5 +22,5 @@ note: previous use here
LL | if { return } {
| ^^^^^^
error: aborting due to 1 previous error
error: aborting due to 2 previous errors