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Auto merge of #119110 - matthiaskrgr:rollup-vr6ha8x, r=matthiaskrgr

Browse Source 
Rollup of 4 pull requests

Successful merges:

 - #119087 (Update books)
 - #119091 (Use alias-eq in structural normalization)
 - #119098 (Adjust the ignore-compare-mode-next-solver for hangs)
 - #119100 (Add the function body span to StableMIR)

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2023-12-19 10:45:09 +00:00
commit 69e4545a8d
27 changed files with 82 additions and 70 deletions
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2
compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
View File

@ -1498,7 +1498,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let ty = self.resolve_vars_with_obligations(ty);
if self.next_trait_solver()
&& let ty::Alias(ty::Projection | ty::Inherent | ty::Weak, _) = ty.kind()
&& let ty::Alias(..) = ty.kind()
{
match self
.at(&self.misc(sp), self.param_env)

1
compiler/rustc_smir/src/rustc_smir/convert/mir.rs
View File

@ -37,6 +37,7 @@ impl<'tcx> Stable<'tcx> for mir::Body<'tcx> {
self.arg_count,
self.var_debug_info.iter().map(|info| info.stable(tables)).collect(),
self.spread_arg.stable(tables),
self.span.stable(tables),
)
}
}

59
compiler/rustc_trait_selection/src/traits/structural_normalize.rs
View File

@ -3,7 +3,7 @@ use rustc_infer::infer::type_variable::{TypeVariableOrigin, TypeVariableOriginKi
use rustc_infer::traits::{FulfillmentError, TraitEngine};
use rustc_middle::ty::{self, Ty};
use crate::traits::{query::evaluate_obligation::InferCtxtExt, NormalizeExt, Obligation};
use crate::traits::{NormalizeExt, Obligation};
pub trait StructurallyNormalizeExt<'tcx> {
fn structurally_normalize(
@ -16,42 +16,43 @@ pub trait StructurallyNormalizeExt<'tcx> {
impl<'tcx> StructurallyNormalizeExt<'tcx> for At<'_, 'tcx> {
fn structurally_normalize(
&self,
mut ty: Ty<'tcx>,
ty: Ty<'tcx>,
fulfill_cx: &mut dyn TraitEngine<'tcx>,
) -> Result<Ty<'tcx>, Vec<FulfillmentError<'tcx>>> {
assert!(!ty.is_ty_var(), "should have resolved vars before calling");
if self.infcx.next_trait_solver() {
// FIXME(-Znext-solver): correctly handle
// overflow here.
for _ in 0..256 {
let ty::Alias(ty::Projection | ty::Inherent | ty::Weak, alias) = *ty.kind() else {
break;
};
// FIXME(-Znext-solver): Should we resolve opaques here?
let ty::Alias(ty::Projection | ty::Inherent | ty::Weak, _) = *ty.kind() else {
return Ok(ty);
};
let new_infer_ty = self.infcx.next_ty_var(TypeVariableOrigin {
kind: TypeVariableOriginKind::NormalizeProjectionType,
span: self.cause.span,
});
let obligation = Obligation::new(
self.infcx.tcx,
self.cause.clone(),
self.param_env,
ty::NormalizesTo { alias, term: new_infer_ty.into() },
);
if self.infcx.predicate_may_hold(&obligation) {
fulfill_cx.register_predicate_obligation(self.infcx, obligation);
let errors = fulfill_cx.select_where_possible(self.infcx);
if !errors.is_empty() {
return Err(errors);
}
ty = self.infcx.resolve_vars_if_possible(new_infer_ty);
} else {
break;
}
let new_infer_ty = self.infcx.next_ty_var(TypeVariableOrigin {
kind: TypeVariableOriginKind::NormalizeProjectionType,
span: self.cause.span,
});
// We simply emit an `alias-eq` goal here, since that will take care of
// normalizing the LHS of the projection until it is a rigid projection
// (or a not-yet-defined opaque in scope).
let obligation = Obligation::new(
self.infcx.tcx,
self.cause.clone(),
self.param_env,
ty::PredicateKind::AliasRelate(
ty.into(),
new_infer_ty.into(),
ty::AliasRelationDirection::Equate,
),
);
fulfill_cx.register_predicate_obligation(self.infcx, obligation);
let errors = fulfill_cx.select_where_possible(self.infcx);
if !errors.is_empty() {
return Err(errors);
}
Ok(ty)
Ok(self.infcx.resolve_vars_if_possible(new_infer_ty))
} else {
Ok(self.normalize(ty).into_value_registering_obligations(self.infcx, fulfill_cx))
}

6
compiler/stable_mir/src/mir/body.rs
View File

@ -27,6 +27,9 @@ pub struct Body {
///
/// This is used for the "rust-call" ABI such as closures.
pub(super) spread_arg: Option<Local>,
/// The span that covers the entire function body.
pub span: Span,
}
pub type BasicBlockIdx = usize;
@ -42,6 +45,7 @@ impl Body {
arg_count: usize,
var_debug_info: Vec<VarDebugInfo>,
spread_arg: Option<Local>,
span: Span,
) -> Self {
// If locals doesn't contain enough entries, it can lead to panics in
// `ret_local`, `arg_locals`, and `inner_locals`.
@ -49,7 +53,7 @@ impl Body {
locals.len() > arg_count,
"A Body must contain at least a local for the return value and each of the function's arguments"
);
Self { blocks, locals, arg_count, var_debug_info, spread_arg }
Self { blocks, locals, arg_count, var_debug_info, spread_arg, span }
}
/// Return local that holds this function's return value.

4
compiler/stable_mir/src/mir/visit.rs
View File

@ -133,7 +133,7 @@ pub trait MirVisitor {
}
fn super_body(&mut self, body: &Body) {
let Body { blocks, locals: _, arg_count, var_debug_info, spread_arg: _ } = body;
let Body { blocks, locals: _, arg_count, var_debug_info, spread_arg: _, span } = body;
for bb in blocks {
self.visit_basic_block(bb);
@ -153,6 +153,8 @@ pub trait MirVisitor {
for info in var_debug_info.iter() {
self.visit_var_debug_info(info);
}
self.visit_span(span)
}
fn super_basic_block(&mut self, bb: &BasicBlock) {

2
src/doc/edition-guide

@ -1 +1 @@
Subproject commit 34fca48ed284525b2f124bf93c51af36d6685492
Subproject commit bbffb074e16bef89772818b400b6c76a65eac126

2
src/doc/embedded-book

@ -1 +1 @@
Subproject commit 22bca3d0f6e9b9b556689b54ce96f25b46ecd1b3
Subproject commit 3f9df2b9885c6741365da2e12ed6662cd0e827d6

2
src/doc/nomicon

@ -1 +1 @@
Subproject commit 83d015105e6d490fc30d6c95da1e56152a50e228
Subproject commit f6bd083c4ccfc4ce6699b8b4154e3c45c5a27a8c

2
src/doc/reference

@ -1 +1 @@
Subproject commit 692d216f5a1151e8852ddb308ba64040e634c876
Subproject commit f9f5b5babd95515e7028c32d6ca4d9790f64c146

2
src/doc/rust-by-example

@ -1 +1 @@
Subproject commit da0a06aada31a324ae84a9eaee344f6a944b9683
Subproject commit 4c2b24ff9d9cf19f2fcff799a3a49b9a2c50ae8e

2
src/doc/rustc-dev-guide

@ -1 +1 @@
Subproject commit 904bb5aa7b21adad58ffae610e2830c7b0f813b0
Subproject commit 0610665a8687b1b0aa037917a1598b9f2a21e3ef

1
tests/ui/issues/issue-22638.rs
View File

@ -1,6 +1,7 @@
// build-fail
// normalize-stderr-test: "<\{closure@.+`" -> "$$CLOSURE`"
// normalize-stderr-test: ".nll/" -> "/"
// ignore-compare-mode-next-solver (hangs)
#![allow(unused)]

4
tests/ui/issues/issue-22638.stderr
View File

@ -1,11 +1,11 @@
error: reached the recursion limit while instantiating `A::matches::$CLOSURE`
--> $DIR/issue-22638.rs:56:9
--> $DIR/issue-22638.rs:57:9
|
LL | a.matches(f)
| ^^^^^^^^^^^^
|
note: `A::matches` defined here
--> $DIR/issue-22638.rs:15:5
--> $DIR/issue-22638.rs:16:5
|
LL | pub fn matches<F: Fn()>(&self, f: &F) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

1
tests/ui/issues/issue-67552.rs
View File

@ -1,7 +1,6 @@
// build-fail
// compile-flags: -Copt-level=0
// normalize-stderr-test: ".nll/" -> "/"
// ignore-compare-mode-next-solver (hangs)
fn main() {
rec(Empty);

4
tests/ui/issues/issue-67552.stderr
View File

@ -1,11 +1,11 @@
error: reached the recursion limit while instantiating `rec::<&mut &mut &mut &mut &mut ...>`
--> $DIR/issue-67552.rs:30:9
--> $DIR/issue-67552.rs:29:9
|
LL | rec(identity(&mut it))
| ^^^^^^^^^^^^^^^^^^^^^^
|
note: `rec` defined here
--> $DIR/issue-67552.rs:23:1
--> $DIR/issue-67552.rs:22:1
|
LL | / fn rec<T>(mut it: T)
LL | | where

1
tests/ui/recursion/issue-95134.rs
View File

@ -3,7 +3,6 @@
// compile-flags: -Copt-level=0
// dont-check-failure-status
// dont-check-compiler-stderr
// ignore-compare-mode-next-solver (hangs)
pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {
if n > 15 {

2
tests/ui/traits/next-solver/alias-bound-unsound.rs
View File

@ -23,7 +23,7 @@ fn main() {
let x = String::from("hello, world");
drop(<() as Foo>::copy_me(&x));
//~^ ERROR overflow evaluating the requirement `<() as Foo>::Item: Sized`
//~| ERROR overflow evaluating the requirement `<() as Foo>::Item normalizes-to _`
//~| ERROR overflow evaluating the requirement `<() as Foo>::Item == _`
//~| ERROR overflow evaluating the requirement `<() as Foo>::Item well-formed`
//~| ERROR overflow evaluating the requirement `String <: <() as Foo>::Item`
//~| ERROR overflow evaluating the requirement `&<() as Foo>::Item well-formed`

3
tests/ui/traits/next-solver/alias-bound-unsound.stderr
View File

@ -19,7 +19,7 @@ LL | drop(<() as Foo>::copy_me(&x));
|
= help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`alias_bound_unsound`)
error[E0275]: overflow evaluating the requirement `<() as Foo>::Item normalizes-to _`
error[E0275]: overflow evaluating the requirement `<() as Foo>::Item == _`
--> $DIR/alias-bound-unsound.rs:24:10
|
LL | drop(<() as Foo>::copy_me(&x));
@ -59,7 +59,6 @@ LL | drop(<() as Foo>::copy_me(&x));
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`alias_bound_unsound`)
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: aborting due to 7 previous errors

15
tests/ui/traits/next-solver/coerce-ambig-alias-to-rigid-alias.rs Normal file
View File

@ -0,0 +1,15 @@
// compile-flags: -Znext-solver
// check-pass
trait Trait {
type Assoc;
}
fn call<T: Trait>(_: <T as Trait>::Assoc, _: T) {}
fn foo<T: Trait>(rigid: <T as Trait>::Assoc, t: T) {
// Check that we can coerce `<?0 as Trait>::Assoc` to `<T as Trait>::Assoc`.
call::<_ /* ?0 */>(rigid, t);
}
fn main() {}

1
tests/ui/traits/next-solver/object-unsafety.rs
View File

@ -13,7 +13,6 @@ pub fn copy_any<T>(t: &T) -> T {
//~^ ERROR the type `&<dyn Setup<From = T> as Setup>::From` is not well-formed
//~| ERROR the trait bound `dyn Setup<From = T>: Setup` is not satisfied
//~| ERROR mismatched types
//~| ERROR mismatched types
//~| ERROR the type `<dyn Setup<From = T> as Setup>::From` is not well-formed
//~| ERROR the size for values of type `<dyn Setup<From = T> as Setup>::From` cannot be known at compilation time

16
tests/ui/traits/next-solver/object-unsafety.stderr
View File

@ -36,20 +36,6 @@ note: function defined here
LL | fn copy<U: Setup + ?Sized>(from: &U::From) -> U::From {
| ^^^^ --------------
error[E0308]: mismatched types
--> $DIR/object-unsafety.rs:12:5
|
LL | pub fn copy_any<T>(t: &T) -> T {
| - - expected `T` because of return type
| |
| expected this type parameter
LL | copy::<dyn Setup<From=T>>(t)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ types differ
|
= note: expected type parameter `T`
found associated type `<dyn Setup<From = T> as Setup>::From`
= note: you might be missing a type parameter or trait bound
error: the type `<dyn Setup<From = T> as Setup>::From` is not well-formed
--> $DIR/object-unsafety.rs:12:5
|
@ -72,7 +58,7 @@ help: consider further restricting the associated type
LL | pub fn copy_any<T>(t: &T) -> T where <dyn Setup<From = T> as Setup>::From: Sized {
| +++++++++++++++++++++++++++++++++++++++++++++++++
error: aborting due to 6 previous errors
error: aborting due to 5 previous errors
Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.

2
tests/ui/type-alias-impl-trait/self-referential-3.rs
View File

@ -1,3 +1,5 @@
// ignore-compare-mode-next-solver (hangs)
#![feature(type_alias_impl_trait)]
type Bar<'a, 'b> = impl PartialEq<Bar<'a, 'b>> + std::fmt::Debug;

2
tests/ui/type-alias-impl-trait/self-referential-3.stderr
View File

@ -1,5 +1,5 @@
error[E0277]: can't compare `&i32` with `Bar<'a, 'b>`
--> $DIR/self-referential-3.rs:5:31
--> $DIR/self-referential-3.rs:7:31
|
LL | fn bar<'a, 'b>(i: &'a i32) -> Bar<'a, 'b> {
| ^^^^^^^^^^^ no implementation for `&i32 == Bar<'a, 'b>`

2
tests/ui/type-alias-impl-trait/self-referential-4.rs
View File

@ -1,3 +1,5 @@
// ignore-compare-mode-next-solver (hangs)
#![feature(type_alias_impl_trait)]
type Bar<'a, 'b> = impl PartialEq<Bar<'b, 'static>> + std::fmt::Debug;

6
tests/ui/type-alias-impl-trait/self-referential-4.stderr
View File

@ -1,5 +1,5 @@
error[E0277]: can't compare `&i32` with `Bar<'b, 'static>`
--> $DIR/self-referential-4.rs:5:31
--> $DIR/self-referential-4.rs:7:31
|
LL | fn bar<'a, 'b>(i: &'a i32) -> Bar<'a, 'b> {
| ^^^^^^^^^^^ no implementation for `&i32 == Bar<'b, 'static>`
@ -10,7 +10,7 @@ LL | i
= help: the trait `PartialEq` is implemented for `i32`
error[E0277]: can't compare `&i32` with `Foo<'static, 'b>`
--> $DIR/self-referential-4.rs:11:31
--> $DIR/self-referential-4.rs:13:31
|
LL | fn foo<'a, 'b>(i: &'a i32) -> Foo<'a, 'b> {
| ^^^^^^^^^^^ no implementation for `&i32 == Foo<'static, 'b>`
@ -21,7 +21,7 @@ LL | i
= help: the trait `PartialEq` is implemented for `i32`
error[E0277]: can't compare `&i32` with `Moo<'static, 'a>`
--> $DIR/self-referential-4.rs:17:31
--> $DIR/self-referential-4.rs:19:31
|
LL | fn moo<'a, 'b>(i: &'a i32) -> Moo<'a, 'b> {
| ^^^^^^^^^^^ no implementation for `&i32 == Moo<'static, 'a>`

2
tests/ui/type-alias-impl-trait/self-referential.rs
View File

@ -1,3 +1,5 @@
// ignore-compare-mode-next-solver (hangs)
#![feature(type_alias_impl_trait)]
type Bar<'a, 'b> = impl PartialEq<Bar<'b, 'a>> + std::fmt::Debug;

6
tests/ui/type-alias-impl-trait/self-referential.stderr
View File

@ -1,5 +1,5 @@
error[E0277]: can't compare `&i32` with `Bar<'b, 'a>`
--> $DIR/self-referential.rs:5:31
--> $DIR/self-referential.rs:7:31
|
LL | fn bar<'a, 'b>(i: &'a i32) -> Bar<'a, 'b> {
| ^^^^^^^^^^^ no implementation for `&i32 == Bar<'b, 'a>`
@ -11,7 +11,7 @@ LL | i
= help: the trait `PartialEq` is implemented for `i32`
error[E0277]: can't compare `&i32` with `(i32, Foo<'a, 'b>::{opaque#0})`
--> $DIR/self-referential.rs:12:31
--> $DIR/self-referential.rs:14:31
|
LL | fn foo<'a, 'b>(i: &'a i32) -> Foo<'a, 'b> {
| ^^^^^^^^^^^ no implementation for `&i32 == (i32, Foo<'a, 'b>::{opaque#0})`
@ -23,7 +23,7 @@ LL | (42, i)
= help: the trait `PartialEq` is implemented for `i32`
error[E0277]: can't compare `&i32` with `(i32, Moo<'b, 'a>::{opaque#0})`
--> $DIR/self-referential.rs:19:31
--> $DIR/self-referential.rs:21:31
|
LL | fn moo<'a, 'b>(i: &'a i32) -> Moo<'a, 'b> {
| ^^^^^^^^^^^ no implementation for `&i32 == (i32, Moo<'b, 'a>::{opaque#0})`