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Auto merge of #67665 - Patryk27:master, r=zackmdavis

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Improve reporting errors and suggestions for trait bounds

Fix #66802

- When printing errors for unsized function parameter, properly point at the parameter instead of function's body.
- Improve `consider further restricting this bound` (and related) messages by separating human-oriented hints from the machine-oriented ones.
This commit is contained in:
bors 2020-02-09 22:13:05 +00:00
commit 840bdc349d
71 changed files with 1039 additions and 375 deletions
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228
src/librustc/traits/error_reporting/mod.rs
View File

@ -27,6 +27,8 @@ use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_errors::{struct_span_err, Applicability, DiagnosticBuilder};
use rustc_hir as hir;
use rustc_hir::def_id::{DefId, LOCAL_CRATE};
use rustc_hir::{QPath, TyKind, WhereBoundPredicate, WherePredicate};
use rustc_span::source_map::SourceMap;
use rustc_span::{ExpnKind, Span, DUMMY_SP};
use std::fmt;
use syntax::ast;
@ -1426,3 +1428,229 @@ impl ArgKind {
}
}
}
/// Suggest restricting a type param with a new bound.
pub fn suggest_constraining_type_param(
tcx: TyCtxt<'_>,
generics: &hir::Generics<'_>,
err: &mut DiagnosticBuilder<'_>,
param_name: &str,
constraint: &str,
source_map: &SourceMap,
span: Span,
def_id: Option<DefId>,
) -> bool {
const MSG_RESTRICT_BOUND_FURTHER: &str = "consider further restricting this bound with";
const MSG_RESTRICT_TYPE: &str = "consider restricting this type parameter with";
const MSG_RESTRICT_TYPE_FURTHER: &str = "consider further restricting this type parameter with";
let param = generics.params.iter().filter(|p| p.name.ident().as_str() == param_name).next();
let param = if let Some(param) = param {
param
} else {
return false;
};
if def_id == tcx.lang_items().sized_trait() {
// Type parameters are already `Sized` by default.
err.span_label(param.span, &format!("this type parameter needs to be `{}`", constraint));
return true;
}
if param_name.starts_with("impl ") {
// If there's an `impl Trait` used in argument position, suggest
// restricting it:
//
// fn foo(t: impl Foo) { ... }
// --------
// |
// help: consider further restricting this bound with `+ Bar`
//
// Suggestion for tools in this case is:
//
// fn foo(t: impl Foo) { ... }
// --------
// |
// replace with: `impl Foo + Bar`
err.span_help(param.span, &format!("{} `+ {}`", MSG_RESTRICT_BOUND_FURTHER, constraint));
err.tool_only_span_suggestion(
param.span,
MSG_RESTRICT_BOUND_FURTHER,
format!("{} + {}", param_name, constraint),
Applicability::MachineApplicable,
);
return true;
}
if generics.where_clause.predicates.is_empty() {
if let Some(bounds_span) = param.bounds_span() {
// If user has provided some bounds, suggest restricting them:
//
// fn foo<T: Foo>(t: T) { ... }
// ---
// |
// help: consider further restricting this bound with `+ Bar`
//
// Suggestion for tools in this case is:
//
// fn foo<T: Foo>(t: T) { ... }
// --
// |
// replace with: `T: Bar +`
err.span_help(
bounds_span,
&format!("{} `+ {}`", MSG_RESTRICT_BOUND_FURTHER, constraint),
);
let span_hi = param.span.with_hi(span.hi());
let span_with_colon = source_map.span_through_char(span_hi, ':');
if span_hi != param.span && span_with_colon != span_hi {
err.tool_only_span_suggestion(
span_with_colon,
MSG_RESTRICT_BOUND_FURTHER,
format!("{}: {} + ", param_name, constraint),
Applicability::MachineApplicable,
);
}
} else {
// If user hasn't provided any bounds, suggest adding a new one:
//
// fn foo<T>(t: T) { ... }
// - help: consider restricting this type parameter with `T: Foo`
err.span_help(
param.span,
&format!("{} `{}: {}`", MSG_RESTRICT_TYPE, param_name, constraint),
);
err.tool_only_span_suggestion(
param.span,
MSG_RESTRICT_TYPE,
format!("{}: {}", param_name, constraint),
Applicability::MachineApplicable,
);
}
true
} else {
// This part is a bit tricky, because using the `where` clause user can
// provide zero, one or many bounds for the same type parameter, so we
// have following cases to consider:
//
// 1) When the type parameter has been provided zero bounds
//
// Message:
// fn foo<X, Y>(x: X, y: Y) where Y: Foo { ... }
// - help: consider restricting this type parameter with `where X: Bar`
//
// Suggestion:
// fn foo<X, Y>(x: X, y: Y) where Y: Foo { ... }
// - insert: `, X: Bar`
//
//
// 2) When the type parameter has been provided one bound
//
// Message:
// fn foo<T>(t: T) where T: Foo { ... }
// ^^^^^^
// |
// help: consider further restricting this bound with `+ Bar`
//
// Suggestion:
// fn foo<T>(t: T) where T: Foo { ... }
// ^^
// |
// replace with: `T: Bar +`
//
//
// 3) When the type parameter has been provided many bounds
//
// Message:
// fn foo<T>(t: T) where T: Foo, T: Bar {... }
// - help: consider further restricting this type parameter with `where T: Zar`
//
// Suggestion:
// fn foo<T>(t: T) where T: Foo, T: Bar {... }
// - insert: `, T: Zar`
let mut param_spans = Vec::new();
for predicate in generics.where_clause.predicates {
if let WherePredicate::BoundPredicate(WhereBoundPredicate {
span, bounded_ty, ..
}) = predicate
{
if let TyKind::Path(QPath::Resolved(_, path)) = &bounded_ty.kind {
if let Some(segment) = path.segments.first() {
if segment.ident.to_string() == param_name {
param_spans.push(span);
}
}
}
}
}
let where_clause_span =
generics.where_clause.span_for_predicates_or_empty_place().shrink_to_hi();
match &param_spans[..] {
&[] => {
err.span_help(
param.span,
&format!("{} `where {}: {}`", MSG_RESTRICT_TYPE, param_name, constraint),
);
err.tool_only_span_suggestion(
where_clause_span,
MSG_RESTRICT_TYPE,
format!(", {}: {}", param_name, constraint),
Applicability::MachineApplicable,
);
}
&[&param_span] => {
err.span_help(
param_span,
&format!("{} `+ {}`", MSG_RESTRICT_BOUND_FURTHER, constraint),
);
let span_hi = param_span.with_hi(span.hi());
let span_with_colon = source_map.span_through_char(span_hi, ':');
if span_hi != param_span && span_with_colon != span_hi {
err.tool_only_span_suggestion(
span_with_colon,
MSG_RESTRICT_BOUND_FURTHER,
format!("{}: {} +", param_name, constraint),
Applicability::MachineApplicable,
);
}
}
_ => {
err.span_help(
param.span,
&format!(
"{} `where {}: {}`",
MSG_RESTRICT_TYPE_FURTHER, param_name, constraint,
),
);
err.tool_only_span_suggestion(
where_clause_span,
MSG_RESTRICT_BOUND_FURTHER,
format!(", {}: {}", param_name, constraint),
Applicability::MachineApplicable,
);
}
}
true
}
}

92
src/librustc/traits/error_reporting/suggestions.rs
View File

@ -4,10 +4,10 @@ use super::{
};
use crate::infer::InferCtxt;
use crate::traits::error_reporting::suggest_constraining_type_param;
use crate::traits::object_safety::object_safety_violations;
use crate::ty::TypeckTables;
use crate::ty::{self, AdtKind, DefIdTree, ToPredicate, Ty, TyCtxt, TypeFoldable, WithConstness};
use rustc_errors::{
error_code, pluralize, struct_span_err, Applicability, DiagnosticBuilder, Style,
};
@ -16,7 +16,6 @@ use rustc_hir::def::DefKind;
use rustc_hir::def_id::DefId;
use rustc_hir::intravisit::Visitor;
use rustc_hir::Node;
use rustc_span::source_map::SourceMap;
use rustc_span::symbol::{kw, sym};
use rustc_span::{MultiSpan, Span, DUMMY_SP};
use std::fmt;
@ -430,12 +429,16 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
.span_take_while(span, |c| c.is_whitespace() || *c == '&');
let remove_refs = refs_remaining + 1;
let format_str =
format!("consider removing {} leading `&`-references", remove_refs);
let msg = if remove_refs == 1 {
"consider removing the leading `&`-reference".to_string()
} else {
format!("consider removing {} leading `&`-references", remove_refs)
};
err.span_suggestion_short(
sp,
&format_str,
&msg,
String::new(),
Applicability::MachineApplicable,
);
@ -1652,85 +1655,6 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
}
}
/// Suggest restricting a type param with a new bound.
pub fn suggest_constraining_type_param(
tcx: TyCtxt<'_>,
generics: &hir::Generics<'_>,
err: &mut DiagnosticBuilder<'_>,
param_name: &str,
constraint: &str,
source_map: &SourceMap,
span: Span,
def_id: Option<DefId>,
) -> bool {
let restrict_msg = "consider further restricting this bound";
if let Some(param) =
generics.params.iter().filter(|p| p.name.ident().as_str() == param_name).next()
{
if def_id == tcx.lang_items().sized_trait() {
// Type parameters are already `Sized` by default.
err.span_label(
param.span,
&format!("this type parameter needs to be `{}`", constraint),
);
} else if param_name.starts_with("impl ") {
// `impl Trait` in argument:
// `fn foo(x: impl Trait) {}` → `fn foo(t: impl Trait + Trait2) {}`
err.span_suggestion(
param.span,
restrict_msg,
// `impl CurrentTrait + MissingTrait`
format!("{} + {}", param_name, constraint),
Applicability::MachineApplicable,
);
} else if generics.where_clause.predicates.is_empty() && param.bounds.is_empty() {
// If there are no bounds whatsoever, suggest adding a constraint
// to the type parameter:
// `fn foo<T>(t: T) {}` → `fn foo<T: Trait>(t: T) {}`
err.span_suggestion(
param.span,
"consider restricting this bound",
format!("{}: {}", param_name, constraint),
Applicability::MachineApplicable,
);
} else if !generics.where_clause.predicates.is_empty() {
// There is a `where` clause, so suggest expanding it:
// `fn foo<T>(t: T) where T: Debug {}` →
// `fn foo<T>(t: T) where T: Debug, T: Trait {}`
err.span_suggestion(
generics.where_clause.span().unwrap().shrink_to_hi(),
&format!("consider further restricting type parameter `{}`", param_name),
format!(", {}: {}", param_name, constraint),
Applicability::MachineApplicable,
);
} else {
// If there is no `where` clause lean towards constraining to the
// type parameter:
// `fn foo<X: Bar, T>(t: T, x: X) {}` → `fn foo<T: Trait>(t: T) {}`
// `fn foo<T: Bar>(t: T) {}` → `fn foo<T: Bar + Trait>(t: T) {}`
let sp = param.span.with_hi(span.hi());
let span = source_map.span_through_char(sp, ':');
if sp != param.span && sp != span {
// Only suggest if we have high certainty that the span
// covers the colon in `foo<T: Trait>`.
err.span_suggestion(
span,
restrict_msg,
format!("{}: {} + ", param_name, constraint),
Applicability::MachineApplicable,
);
} else {
err.span_label(
param.span,
&format!("consider adding a `where {}: {}` bound", param_name, constraint),
);
}
}
return true;
}
false
}
/// Collect all the returned expressions within the input expression.
/// Used to point at the return spans when we want to suggest some change to them.
#[derive(Default)]

12
src/librustc_hir/hir.rs
View File

@ -441,6 +441,16 @@ pub struct GenericParam<'hir> {
pub kind: GenericParamKind<'hir>,
}
impl GenericParam<'hir> {
pub fn bounds_span(&self) -> Option<Span> {
self.bounds.iter().fold(None, |span, bound| {
let span = span.map(|s| s.to(bound.span())).unwrap_or_else(|| bound.span());
Some(span)
})
}
}
#[derive(Default)]
pub struct GenericParamCount {
pub lifetimes: usize,
@ -513,7 +523,7 @@ pub enum SyntheticTyParamKind {
#[derive(RustcEncodable, RustcDecodable, Debug, HashStable_Generic)]
pub struct WhereClause<'hir> {
pub predicates: &'hir [WherePredicate<'hir>],
// Only valid if predicates isn't empty.
// Only valid if predicates aren't empty.
pub span: Span,
}

2
src/librustc_mir/borrow_check/diagnostics/conflict_errors.rs
View File

@ -3,7 +3,7 @@ use rustc::mir::{
FakeReadCause, Local, LocalDecl, LocalInfo, LocalKind, Location, Operand, Place, PlaceRef,
ProjectionElem, Rvalue, Statement, StatementKind, TerminatorKind, VarBindingForm,
};
use rustc::traits::error_reporting::suggestions::suggest_constraining_type_param;
use rustc::traits::error_reporting::suggest_constraining_type_param;
use rustc::ty::{self, Ty};
use rustc_data_structures::fx::FxHashSet;
use rustc_errors::{Applicability, DiagnosticBuilder};

2
src/librustc_typeck/check/mod.rs
View File

@ -1354,7 +1354,7 @@ fn check_fn<'a, 'tcx>(
// for simple cases like `fn foo(x: Trait)`,
// where we would error once on the parameter as a whole, and once on the binding `x`.
if param.pat.simple_ident().is_none() && !tcx.features().unsized_locals {
fcx.require_type_is_sized(param_ty, decl.output.span(), traits::SizedArgumentType);
fcx.require_type_is_sized(param_ty, param.pat.span, traits::SizedArgumentType);
}
fcx.write_ty(param.hir_id, param_ty);

8
src/test/ui/associated-const/associated-const-type-parameter-arrays-2.stderr
View File

@ -4,10 +4,14 @@ error[E0277]: the trait bound `A: Foo` is not satisfied
LL | const Y: usize;
| --------------- required by `Foo::Y`
...
LL | pub fn test<A: Foo, B: Foo>() {
| -- help: consider further restricting this bound: `A: Foo +`
LL | let _array = [4; <A as Foo>::Y];
| ^^^^^^^^^^^^^ the trait `Foo` is not implemented for `A`
|
help: consider further restricting this bound with `+ Foo`
--> $DIR/associated-const-type-parameter-arrays-2.rs:15:16
|
LL | pub fn test<A: Foo, B: Foo>() {
| ^^^
error: aborting due to previous error

8
src/test/ui/associated-const/associated-const-type-parameter-arrays.stderr
View File

@ -4,10 +4,14 @@ error[E0277]: the trait bound `A: Foo` is not satisfied
LL | const Y: usize;
| --------------- required by `Foo::Y`
...
LL | pub fn test<A: Foo, B: Foo>() {
| -- help: consider further restricting this bound: `A: Foo +`
LL | let _array: [u32; <A as Foo>::Y];
| ^^^^^^^^^^^^^ the trait `Foo` is not implemented for `A`
|
help: consider further restricting this bound with `+ Foo`
--> $DIR/associated-const-type-parameter-arrays.rs:15:16
|
LL | pub fn test<A: Foo, B: Foo>() {
| ^^^
error: aborting due to previous error

8
src/test/ui/associated-types/associated-types-invalid-trait-ref-issue-18865.stderr
View File

@ -1,10 +1,14 @@
error[E0277]: the trait bound `T: Foo<usize>` is not satisfied
--> $DIR/associated-types-invalid-trait-ref-issue-18865.rs:10:12
|
LL | fn f<T:Foo<isize>>(t: &T) {
| -- help: consider further restricting this bound: `T: Foo<usize> +`
LL | let u: <T as Foo<usize>>::Bar = t.get_bar();
| ^^^^^^^^^^^^^^^^^^^^^^ the trait `Foo<usize>` is not implemented for `T`
|
help: consider further restricting this bound with `+ Foo<usize>`
--> $DIR/associated-types-invalid-trait-ref-issue-18865.rs:9:8
|
LL | fn f<T:Foo<isize>>(t: &T) {
| ^^^^^^^^^^
error: aborting due to previous error

11
src/test/ui/associated-types/associated-types-no-suitable-bound.stderr
View File

@ -2,10 +2,13 @@ error[E0277]: the trait bound `T: Get` is not satisfied
--> $DIR/associated-types-no-suitable-bound.rs:11:5
|
LL | fn uhoh<T>(foo: <T as Get>::Value) {}
| ^^^^^^^^-^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| | |
| | help: consider restricting this bound: `T: Get`
| the trait `Get` is not implemented for `T`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `T`
|
help: consider restricting this type parameter with `T: Get`
--> $DIR/associated-types-no-suitable-bound.rs:11:13
|
LL | fn uhoh<T>(foo: <T as Get>::Value) {}
| ^
error: aborting due to previous error

7
src/test/ui/bad/bad-method-typaram-kind.stderr
View File

@ -1,12 +1,15 @@
error[E0277]: `T` cannot be sent between threads safely
--> $DIR/bad-method-typaram-kind.rs:2:7
|
LL | fn foo<T:'static>() {
| -- help: consider further restricting this bound: `T: std::marker::Send +`
LL | 1.bar::<T>();
| ^^^ `T` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `T`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/bad-method-typaram-kind.rs:1:10
|
LL | fn foo<T:'static>() {
| ^^^^^^^
error: aborting due to previous error

200
src/test/ui/binop/binop-consume-args.stderr
View File

@ -2,251 +2,331 @@ error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:7:10
|
LL | fn add<A: Add<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs + rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:5:11
|
LL | fn add<A: Add<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:8:10
|
LL | fn add<A: Add<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs + rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:5:30
|
LL | fn add<A: Add<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:13:10
|
LL | fn sub<A: Sub<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs - rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:11:11
|
LL | fn sub<A: Sub<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:14:10
|
LL | fn sub<A: Sub<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs - rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:11:30
|
LL | fn sub<A: Sub<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:19:10
|
LL | fn mul<A: Mul<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs * rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:17:11
|
LL | fn mul<A: Mul<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:20:10
|
LL | fn mul<A: Mul<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs * rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:17:30
|
LL | fn mul<A: Mul<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:25:10
|
LL | fn div<A: Div<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs / rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:23:11
|
LL | fn div<A: Div<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:26:10
|
LL | fn div<A: Div<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs / rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:23:30
|
LL | fn div<A: Div<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:31:10
|
LL | fn rem<A: Rem<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs % rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:29:11
|
LL | fn rem<A: Rem<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:32:10
|
LL | fn rem<A: Rem<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs % rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:29:30
|
LL | fn rem<A: Rem<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:37:10
|
LL | fn bitand<A: BitAnd<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs & rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:35:14
|
LL | fn bitand<A: BitAnd<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:38:10
|
LL | fn bitand<A: BitAnd<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs & rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:35:36
|
LL | fn bitand<A: BitAnd<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:43:10
|
LL | fn bitor<A: BitOr<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs | rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:41:13
|
LL | fn bitor<A: BitOr<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:44:10
|
LL | fn bitor<A: BitOr<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs | rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:41:34
|
LL | fn bitor<A: BitOr<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:49:10
|
LL | fn bitxor<A: BitXor<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs ^ rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:47:14
|
LL | fn bitxor<A: BitXor<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:50:10
|
LL | fn bitxor<A: BitXor<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs ^ rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:47:36
|
LL | fn bitxor<A: BitXor<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:55:10
|
LL | fn shl<A: Shl<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs << rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:53:11
|
LL | fn shl<A: Shl<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:56:10
|
LL | fn shl<A: Shl<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs << rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:53:30
|
LL | fn shl<A: Shl<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error[E0382]: use of moved value: `lhs`
--> $DIR/binop-consume-args.rs:61:10
|
LL | fn shr<A: Shr<B, Output=()>, B>(lhs: A, rhs: B) {
| -- --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `A: Copy +`
| --- move occurs because `lhs` has type `A`, which does not implement the `Copy` trait
LL | lhs >> rhs;
| --- value moved here
LL | drop(lhs);
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-consume-args.rs:59:11
|
LL | fn shr<A: Shr<B, Output=()>, B>(lhs: A, rhs: B) {
| ^^^^^^^^^^^^^^^^^
error[E0382]: use of moved value: `rhs`
--> $DIR/binop-consume-args.rs:62:10
|
LL | fn shr<A: Shr<B, Output=()>, B>(lhs: A, rhs: B) {
| - --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
| |
| help: consider restricting this bound: `B: Copy`
| --- move occurs because `rhs` has type `B`, which does not implement the `Copy` trait
LL | lhs >> rhs;
| --- value moved here
LL | drop(lhs);
LL | drop(rhs);
| ^^^ value used here after move
|
help: consider restricting this type parameter with `B: Copy`
--> $DIR/binop-consume-args.rs:59:30
|
LL | fn shr<A: Shr<B, Output=()>, B>(lhs: A, rhs: B) {
| ^
error: aborting due to 20 previous errors

20
src/test/ui/binop/binop-move-semantics.stderr
View File

@ -2,27 +2,35 @@ error[E0382]: use of moved value: `x`
--> $DIR/binop-move-semantics.rs:8:5
|
LL | fn double_move<T: Add<Output=()>>(x: T) {
| -- - move occurs because `x` has type `T`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `T: Copy +`
| - move occurs because `x` has type `T`, which does not implement the `Copy` trait
LL | x
| - value moved here
LL | +
LL | x;
| ^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-move-semantics.rs:5:19
|
LL | fn double_move<T: Add<Output=()>>(x: T) {
| ^^^^^^^^^^^^^^
error[E0382]: borrow of moved value: `x`
--> $DIR/binop-move-semantics.rs:14:5
|
LL | fn move_then_borrow<T: Add<Output=()> + Clone>(x: T) {
| -- - move occurs because `x` has type `T`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `T: Copy +`
| - move occurs because `x` has type `T`, which does not implement the `Copy` trait
LL | x
| - value moved here
LL | +
LL | x.clone();
| ^ value borrowed here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/binop-move-semantics.rs:11:24
|
LL | fn move_then_borrow<T: Add<Output=()> + Clone>(x: T) {
| ^^^^^^^^^^^^^^^^^^^^^^
error[E0505]: cannot move out of `x` because it is borrowed
--> $DIR/binop-move-semantics.rs:21:5

10
src/test/ui/borrowck/borrowck-unboxed-closures.stderr
View File

@ -20,13 +20,17 @@ error[E0382]: use of moved value: `f`
--> $DIR/borrowck-unboxed-closures.rs:12:5
|
LL | fn c<F:FnOnce(isize, isize) -> isize>(f: F) {
| -- - move occurs because `f` has type `F`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `F: Copy +`
| - move occurs because `f` has type `F`, which does not implement the `Copy` trait
LL | f(1, 2);
| - value moved here
LL | f(1, 2);
| ^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/borrowck-unboxed-closures.rs:10:8
|
LL | fn c<F:FnOnce(isize, isize) -> isize>(f: F) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 3 previous errors

39
src/test/ui/bound-suggestions.fixed Normal file
View File

@ -0,0 +1,39 @@
// run-rustfix
#[allow(dead_code)]
fn test_impl(t: impl Sized + std::fmt::Debug) {
println!("{:?}", t);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_no_bounds<T: std::fmt::Debug>(t: T) {
println!("{:?}", t);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_one_bound<T: std::fmt::Debug + Sized>(t: T) {
println!("{:?}", t);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_no_bounds_where<X, Y>(x: X, y: Y) where X: std::fmt::Debug, Y: std::fmt::Debug {
println!("{:?} {:?}", x, y);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_one_bound_where<X>(x: X) where X: std::fmt::Debug + Sized {
println!("{:?}", x);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_many_bounds_where<X>(x: X) where X: Sized, X: Sized, X: std::fmt::Debug {
println!("{:?}", x);
//~^ ERROR doesn't implement
}
pub fn main() { }

39
src/test/ui/bound-suggestions.rs Normal file
View File

@ -0,0 +1,39 @@
// run-rustfix
#[allow(dead_code)]
fn test_impl(t: impl Sized) {
println!("{:?}", t);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_no_bounds<T>(t: T) {
println!("{:?}", t);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_one_bound<T: Sized>(t: T) {
println!("{:?}", t);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_no_bounds_where<X, Y>(x: X, y: Y) where X: std::fmt::Debug {
println!("{:?} {:?}", x, y);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_one_bound_where<X>(x: X) where X: Sized {
println!("{:?}", x);
//~^ ERROR doesn't implement
}
#[allow(dead_code)]
fn test_many_bounds_where<X>(x: X) where X: Sized, X: Sized {
println!("{:?}", x);
//~^ ERROR doesn't implement
}
pub fn main() { }

93
src/test/ui/bound-suggestions.stderr Normal file
View File

@ -0,0 +1,93 @@
error[E0277]: `impl Sized` doesn't implement `std::fmt::Debug`
--> $DIR/bound-suggestions.rs:5:22
|
LL | println!("{:?}", t);
| ^ `impl Sized` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
|
= help: the trait `std::fmt::Debug` is not implemented for `impl Sized`
help: consider further restricting this bound with `+ std::fmt::Debug`
--> $DIR/bound-suggestions.rs:4:17
|
LL | fn test_impl(t: impl Sized) {
| ^^^^^^^^^^
= note: required by `std::fmt::Debug::fmt`
= note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: `T` doesn't implement `std::fmt::Debug`
--> $DIR/bound-suggestions.rs:11:22
|
LL | println!("{:?}", t);
| ^ `T` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
|
= help: the trait `std::fmt::Debug` is not implemented for `T`
help: consider restricting this type parameter with `T: std::fmt::Debug`
--> $DIR/bound-suggestions.rs:10:19
|
LL | fn test_no_bounds<T>(t: T) {
| ^
= note: required by `std::fmt::Debug::fmt`
= note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: `T` doesn't implement `std::fmt::Debug`
--> $DIR/bound-suggestions.rs:17:22
|
LL | println!("{:?}", t);
| ^ `T` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
|
= help: the trait `std::fmt::Debug` is not implemented for `T`
help: consider further restricting this bound with `+ std::fmt::Debug`
--> $DIR/bound-suggestions.rs:16:22
|
LL | fn test_one_bound<T: Sized>(t: T) {
| ^^^^^
= note: required by `std::fmt::Debug::fmt`
= note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: `Y` doesn't implement `std::fmt::Debug`
--> $DIR/bound-suggestions.rs:23:30
|
LL | println!("{:?} {:?}", x, y);
| ^ `Y` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
|
= help: the trait `std::fmt::Debug` is not implemented for `Y`
help: consider restricting this type parameter with `where Y: std::fmt::Debug`
--> $DIR/bound-suggestions.rs:22:28
|
LL | fn test_no_bounds_where<X, Y>(x: X, y: Y) where X: std::fmt::Debug {
| ^
= note: required by `std::fmt::Debug::fmt`
= note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: `X` doesn't implement `std::fmt::Debug`
--> $DIR/bound-suggestions.rs:29:22
|
LL | println!("{:?}", x);
| ^ `X` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
|
= help: the trait `std::fmt::Debug` is not implemented for `X`
help: consider further restricting this bound with `+ std::fmt::Debug`
--> $DIR/bound-suggestions.rs:28:40
|
LL | fn test_one_bound_where<X>(x: X) where X: Sized {
| ^^^^^^^^
= note: required by `std::fmt::Debug::fmt`
= note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: `X` doesn't implement `std::fmt::Debug`
--> $DIR/bound-suggestions.rs:35:22
|
LL | println!("{:?}", x);
| ^ `X` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
|
= help: the trait `std::fmt::Debug` is not implemented for `X`
help: consider further restricting this type parameter with `where X: std::fmt::Debug`
--> $DIR/bound-suggestions.rs:34:27
|
LL | fn test_many_bounds_where<X>(x: X) where X: Sized, X: Sized {
| ^
= note: required by `std::fmt::Debug::fmt`
= note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to 6 previous errors
For more information about this error, try `rustc --explain E0277`.

18
src/test/ui/builtin-superkinds/builtin-superkinds-double-superkind.stderr
View File

@ -2,22 +2,28 @@ error[E0277]: `T` cannot be sent between threads safely
--> $DIR/builtin-superkinds-double-superkind.rs:6:24
|
LL | impl <T: Sync+'static> Foo for (T,) { }
| -- ^^^ `T` cannot be sent between threads safely
| |
| help: consider further restricting this bound: `T: std::marker::Send +`
| ^^^ `T` cannot be sent between threads safely
|
= help: within `(T,)`, the trait `std::marker::Send` is not implemented for `T`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/builtin-superkinds-double-superkind.rs:6:10
|
LL | impl <T: Sync+'static> Foo for (T,) { }
| ^^^^^^^^^^^^
= note: required because it appears within the type `(T,)`
error[E0277]: `T` cannot be shared between threads safely
--> $DIR/builtin-superkinds-double-superkind.rs:9:16
|
LL | impl <T: Send> Foo for (T,T) { }
| -- ^^^ `T` cannot be shared between threads safely
| |
| help: consider further restricting this bound: `T: std::marker::Sync +`
| ^^^ `T` cannot be shared between threads safely
|
= help: within `(T, T)`, the trait `std::marker::Sync` is not implemented for `T`
help: consider further restricting this bound with `+ std::marker::Sync`
--> $DIR/builtin-superkinds-double-superkind.rs:9:10
|
LL | impl <T: Send> Foo for (T,T) { }
| ^^^^
= note: required because it appears within the type `(T, T)`
error: aborting due to 2 previous errors

9
src/test/ui/builtin-superkinds/builtin-superkinds-in-metadata.stderr
View File

@ -2,11 +2,14 @@ error[E0277]: `T` cannot be sent between threads safely
--> $DIR/builtin-superkinds-in-metadata.rs:13:23
|
LL | impl <T:Sync+'static> RequiresRequiresShareAndSend for X<T> { }
| -- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `T` cannot be sent between threads safely
| |
| help: consider further restricting this bound: `T: std::marker::Send +`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `T` cannot be sent between threads safely
|
= help: within `X<T>`, the trait `std::marker::Send` is not implemented for `T`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/builtin-superkinds-in-metadata.rs:13:9
|
LL | impl <T:Sync+'static> RequiresRequiresShareAndSend for X<T> { }
| ^^^^^^^^^^^^
= note: required because it appears within the type `X<T>`
error: aborting due to previous error

9
src/test/ui/builtin-superkinds/builtin-superkinds-typaram-not-send.stderr
View File

@ -2,11 +2,14 @@ error[E0277]: `T` cannot be sent between threads safely
--> $DIR/builtin-superkinds-typaram-not-send.rs:5:24
|
LL | impl <T: Sync+'static> Foo for T { }
| -- ^^^ `T` cannot be sent between threads safely
| |
| help: consider further restricting this bound: `T: std::marker::Send +`
| ^^^ `T` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `T`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/builtin-superkinds-typaram-not-send.rs:5:10
|
LL | impl <T: Sync+'static> Foo for T { }
| ^^^^^^^^^^^^
error: aborting due to previous error

9
src/test/ui/closures/closure-bounds-cant-promote-superkind-in-struct.stderr
View File

@ -5,11 +5,14 @@ LL | struct X<F> where F: FnOnce() + 'static + Send {
| ---------------------------------------------- required by `X`
...
LL | fn foo<F>(blk: F) -> X<F> where F: FnOnce() + 'static {
| ^^^^ - help: consider further restricting type parameter `F`: `, F: std::marker::Send`
| |
| `F` cannot be sent between threads safely
| ^^^^ `F` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `F`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/closure-bounds-cant-promote-superkind-in-struct.rs:5:33
|
LL | fn foo<F>(blk: F) -> X<F> where F: FnOnce() + 'static {
| ^^^^^^^^^^^^^^^^^^^^^
error: aborting due to previous error

8
src/test/ui/closures/closure-bounds-subtype.stderr
View File

@ -4,13 +4,15 @@ error[E0277]: `F` cannot be shared between threads safely
LL | fn take_const_owned<F>(_: F) where F: FnOnce() + Sync + Send {
| ---------------- ---- required by this bound in `take_const_owned`
...
LL | fn give_owned<F>(f: F) where F: FnOnce() + Send {
| - help: consider further restricting type parameter `F`: `, F: std::marker::Sync`
LL | take_any(f);
LL | take_const_owned(f);
| ^ `F` cannot be shared between threads safely
|
= help: the trait `std::marker::Sync` is not implemented for `F`
help: consider further restricting this bound with `+ std::marker::Sync`
--> $DIR/closure-bounds-subtype.rs:11:30
|
LL | fn give_owned<F>(f: F) where F: FnOnce() + Send {
| ^^^^^^^^^^^^^^^^^^
error: aborting due to previous error

7
src/test/ui/closures/issue-67123.stderr
View File

@ -1,13 +1,16 @@
error[E0382]: use of moved value: `t`
--> $DIR/issue-67123.rs:2:13
|
LL | fn foo<T>(t: T) {
| - help: consider restricting this bound: `T: Copy`
LL | || { t; t; };
| - ^ value used here after move
| |
| value moved here
|
help: consider restricting this type parameter with `T: Copy`
--> $DIR/issue-67123.rs:1:8
|
LL | fn foo<T>(t: T) {
| ^
= note: move occurs because `t` has type `T`, which does not implement the `Copy` trait
error: aborting due to previous error

8
src/test/ui/generic-associated-types/impl_bounds.stderr
View File

@ -31,12 +31,14 @@ LL | type B<'a, 'b> where 'b: 'a = (&'a(), &'b ());
error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
--> $DIR/impl_bounds.rs:19:5
|
LL | impl<T> Foo for Fooy<T> {
| - help: consider restricting this bound: `T: std::marker::Copy`
...
LL | type C where Self: Copy = String;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/impl_bounds.rs:14:6
|
LL | impl<T> Foo for Fooy<T> {
| ^
= note: required because of the requirements on the impl of `std::marker::Copy` for `Fooy<T>`
= note: the requirement `Fooy<T>: std::marker::Copy` appears on the associated impl type but not on the corresponding associated trait type

9
src/test/ui/hrtb/hrtb-higher-ranker-supertraits-transitive.stderr
View File

@ -6,11 +6,14 @@ LL | fn want_bar_for_any_ccx<B>(b: &B)
LL | where B : for<'ccx> Bar<'ccx>
| ------------------- required by this bound in `want_bar_for_any_ccx`
...
LL | where B : Qux
| - help: consider further restricting type parameter `B`: `, B: for<'ccx> Bar<'ccx>`
...
LL | want_bar_for_any_ccx(b);
| ^ the trait `for<'ccx> Bar<'ccx>` is not implemented for `B`
|
help: consider further restricting this bound with `+ for<'ccx> Bar<'ccx>`
--> $DIR/hrtb-higher-ranker-supertraits-transitive.rs:44:11
|
LL | where B : Qux
| ^^^^^^^
error: aborting due to previous error

18
src/test/ui/hrtb/hrtb-higher-ranker-supertraits.stderr
View File

@ -1,9 +1,6 @@
error[E0277]: the trait bound `for<'tcx> F: Foo<'tcx>` is not satisfied
--> $DIR/hrtb-higher-ranker-supertraits.rs:18:26
|
LL | where F : Foo<'x>
| - help: consider further restricting type parameter `F`: `, F: for<'tcx> Foo<'tcx>`
...
LL | want_foo_for_any_tcx(f);
| ^ the trait `for<'tcx> Foo<'tcx>` is not implemented for `F`
...
@ -11,13 +8,16 @@ LL | fn want_foo_for_any_tcx<F>(f: &F)
| --------------------
LL | where F : for<'tcx> Foo<'tcx>
| ------------------- required by this bound in `want_foo_for_any_tcx`
|
help: consider further restricting this bound with `+ for<'tcx> Foo<'tcx>`
--> $DIR/hrtb-higher-ranker-supertraits.rs:15:11
|
LL | where F : Foo<'x>
| ^^^^^^^^^^^
error[E0277]: the trait bound `for<'ccx> B: Bar<'ccx>` is not satisfied
--> $DIR/hrtb-higher-ranker-supertraits.rs:35:26
|
LL | where B : Bar<'x>
| - help: consider further restricting type parameter `B`: `, B: for<'ccx> Bar<'ccx>`
...
LL | want_bar_for_any_ccx(b);
| ^ the trait `for<'ccx> Bar<'ccx>` is not implemented for `B`
...
@ -25,6 +25,12 @@ LL | fn want_bar_for_any_ccx<B>(b: &B)
| --------------------
LL | where B : for<'ccx> Bar<'ccx>
| ------------------- required by this bound in `want_bar_for_any_ccx`
|
help: consider further restricting this bound with `+ for<'ccx> Bar<'ccx>`
--> $DIR/hrtb-higher-ranker-supertraits.rs:29:11
|
LL | where B : Bar<'x>
| ^^^^^^^^^^^
error: aborting due to 2 previous errors

15
src/test/ui/impl-trait/issue-55872-1.stderr
View File

@ -1,11 +1,14 @@
error[E0277]: the trait bound `S: std::marker::Copy` is not satisfied in `(S, T)`
--> $DIR/issue-55872-1.rs:12:5
|
LL | impl<S: Default> Bar for S {
| -- help: consider further restricting this bound: `S: std::marker::Copy +`
LL | type E = impl Copy;
| ^^^^^^^^^^^^^^^^^^^ within `(S, T)`, the trait `std::marker::Copy` is not implemented for `S`
|
help: consider further restricting this bound with `+ std::marker::Copy`
--> $DIR/issue-55872-1.rs:11:9
|
LL | impl<S: Default> Bar for S {
| ^^^^^^^
= note: required because it appears within the type `(S, T)`
= note: the return type of a function must have a statically known size
@ -14,10 +17,12 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied in `(S, T)
|
LL | type E = impl Copy;
| ^^^^^^^^^^^^^^^^^^^ within `(S, T)`, the trait `std::marker::Copy` is not implemented for `T`
...
LL | fn foo<T: Default>() -> Self::E {
| -- help: consider further restricting this bound: `T: std::marker::Copy +`
|
help: consider further restricting this bound with `+ std::marker::Copy`
--> $DIR/issue-55872-1.rs:16:15
|
LL | fn foo<T: Default>() -> Self::E {
| ^^^^^^^
= note: required because it appears within the type `(S, T)`
= note: the return type of a function must have a statically known size

10
src/test/ui/issues/issue-21837.stderr
View File

@ -5,9 +5,13 @@ LL | pub struct Foo<T: Bound>(T);
| ---------------------------- required by `Foo`
...
LL | impl<T> Trait2 for Foo<T> {}
| - ^^^^^^ the trait `Bound` is not implemented for `T`
| |
| help: consider restricting this bound: `T: Bound`
| ^^^^^^ the trait `Bound` is not implemented for `T`
|
help: consider restricting this type parameter with `T: Bound`
--> $DIR/issue-21837.rs:8:6
|
LL | impl<T> Trait2 for Foo<T> {}
| ^
error: aborting due to previous error

10
src/test/ui/issues/issue-34721.stderr
View File

@ -2,9 +2,7 @@ error[E0382]: use of moved value: `x`
--> $DIR/issue-34721.rs:27:9
|
LL | pub fn baz<T: Foo>(x: T) -> T {
| -- - move occurs because `x` has type `T`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `T: Copy +`
| - move occurs because `x` has type `T`, which does not implement the `Copy` trait
LL | if 0 == 1 {
LL | bar::bar(x.zero())
| - value moved here
@ -14,6 +12,12 @@ LL | x.zero()
LL | };
LL | x.zero()
| ^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/issue-34721.rs:21:19
|
LL | pub fn baz<T: Foo>(x: T) -> T {
| ^^^
error: aborting due to previous error

4
src/test/ui/issues/issue-38954.stderr
View File

@ -1,8 +1,8 @@
error[E0277]: the size for values of type `str` cannot be known at compilation time
--> $DIR/issue-38954.rs:1:23
--> $DIR/issue-38954.rs:1:10
|
LL | fn _test(ref _p: str) {}
| ^ doesn't have a size known at compile-time
| ^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `std::marker::Sized` is not implemented for `str`
= note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>

4
src/test/ui/issues/issue-41229-ref-str.stderr
View File

@ -1,8 +1,8 @@
error[E0277]: the size for values of type `str` cannot be known at compilation time
--> $DIR/issue-41229-ref-str.rs:1:28
--> $DIR/issue-41229-ref-str.rs:1:16
|
LL | pub fn example(ref s: str) {}
| ^ doesn't have a size known at compile-time
| ^^^^^ doesn't have a size known at compile-time
|
= help: the trait `std::marker::Sized` is not implemented for `str`
= note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>

12
src/test/ui/issues/issue-42312.stderr
View File

@ -1,10 +1,10 @@
error[E0277]: the size for values of type `<Self as std::ops::Deref>::Target` cannot be known at compilation time
--> $DIR/issue-42312.rs:4:29
--> $DIR/issue-42312.rs:4:12
|
LL | fn baz(_: Self::Target) where Self: Deref {}
| ^ - help: consider further restricting the associated type: `, <Self as std::ops::Deref>::Target: std::marker::Sized`
| |
| doesn't have a size known at compile-time
| ^ - help: consider further restricting the associated type: `, <Self as std::ops::Deref>::Target: std::marker::Sized`
| |
| doesn't have a size known at compile-time
|
= help: the trait `std::marker::Sized` is not implemented for `<Self as std::ops::Deref>::Target`
= note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
@ -12,10 +12,10 @@ LL | fn baz(_: Self::Target) where Self: Deref {}
= help: unsized locals are gated as an unstable feature
error[E0277]: the size for values of type `(dyn std::string::ToString + 'static)` cannot be known at compilation time
--> $DIR/issue-42312.rs:8:27
--> $DIR/issue-42312.rs:8:10
|
LL | pub fn f(_: dyn ToString) {}
| ^ doesn't have a size known at compile-time
| ^ doesn't have a size known at compile-time
|
= help: the trait `std::marker::Sized` is not implemented for `(dyn std::string::ToString + 'static)`
= note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>

11
src/test/ui/issues/issue-43784-associated-type.stderr
View File

@ -5,12 +5,15 @@ LL | type Assoc: Partial<Self>;
| ----- associated type defined here
...
LL | impl<T> Complete for T {
| ----------------------
| | |
| | help: consider restricting this bound: `T: std::marker::Copy`
| in this `impl` item
| ---------------------- in this `impl` item
LL | type Assoc = T;
| ^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/issue-43784-associated-type.rs:13:6
|
LL | impl<T> Complete for T {
| ^
error: aborting due to previous error

10
src/test/ui/issues/issue-43784-supertrait.stderr
View File

@ -2,9 +2,13 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
--> $DIR/issue-43784-supertrait.rs:8:9
|
LL | impl<T> Complete for T {}
| - ^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
| |
| help: consider restricting this bound: `T: std::marker::Copy`
| ^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/issue-43784-supertrait.rs:8:6
|
LL | impl<T> Complete for T {}
| ^
error: aborting due to previous error

32
src/test/ui/kindck/kindck-impl-type-params.nll.stderr
View File

@ -1,50 +1,58 @@
error[E0277]: `T` cannot be sent between threads safely
--> $DIR/kindck-impl-type-params.rs:18:13
|
LL | fn f<T>(val: T) {
| - help: consider restricting this bound: `T: std::marker::Send`
LL | let t: S<T> = S(marker::PhantomData);
LL | let a = &t as &dyn Gettable<T>;
| ^^ `T` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `T`
help: consider restricting this type parameter with `T: std::marker::Send`
--> $DIR/kindck-impl-type-params.rs:16:6
|
LL | fn f<T>(val: T) {
| ^
= note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
= note: required for the cast to the object type `dyn Gettable<T>`
error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
--> $DIR/kindck-impl-type-params.rs:18:13
|
LL | fn f<T>(val: T) {
| - help: consider restricting this bound: `T: std::marker::Copy`
LL | let t: S<T> = S(marker::PhantomData);
LL | let a = &t as &dyn Gettable<T>;
| ^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/kindck-impl-type-params.rs:16:6
|
LL | fn f<T>(val: T) {
| ^
= note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
= note: required for the cast to the object type `dyn Gettable<T>`
error[E0277]: `T` cannot be sent between threads safely
--> $DIR/kindck-impl-type-params.rs:25:31
|
LL | fn g<T>(val: T) {
| - help: consider restricting this bound: `T: std::marker::Send`
LL | let t: S<T> = S(marker::PhantomData);
LL | let a: &dyn Gettable<T> = &t;
| ^^ `T` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `T`
help: consider restricting this type parameter with `T: std::marker::Send`
--> $DIR/kindck-impl-type-params.rs:23:6
|
LL | fn g<T>(val: T) {
| ^
= note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
= note: required for the cast to the object type `dyn Gettable<T>`
error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
--> $DIR/kindck-impl-type-params.rs:25:31
|
LL | fn g<T>(val: T) {
| - help: consider restricting this bound: `T: std::marker::Copy`
LL | let t: S<T> = S(marker::PhantomData);
LL | let a: &dyn Gettable<T> = &t;
| ^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/kindck-impl-type-params.rs:23:6
|
LL | fn g<T>(val: T) {
| ^
= note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
= note: required for the cast to the object type `dyn Gettable<T>`

32
src/test/ui/kindck/kindck-impl-type-params.stderr
View File

@ -1,50 +1,58 @@
error[E0277]: `T` cannot be sent between threads safely
--> $DIR/kindck-impl-type-params.rs:18:13
|
LL | fn f<T>(val: T) {
| - help: consider restricting this bound: `T: std::marker::Send`
LL | let t: S<T> = S(marker::PhantomData);
LL | let a = &t as &dyn Gettable<T>;
| ^^ `T` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `T`
help: consider restricting this type parameter with `T: std::marker::Send`
--> $DIR/kindck-impl-type-params.rs:16:6
|
LL | fn f<T>(val: T) {
| ^
= note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
= note: required for the cast to the object type `dyn Gettable<T>`
error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
--> $DIR/kindck-impl-type-params.rs:18:13
|
LL | fn f<T>(val: T) {
| - help: consider restricting this bound: `T: std::marker::Copy`
LL | let t: S<T> = S(marker::PhantomData);
LL | let a = &t as &dyn Gettable<T>;
| ^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/kindck-impl-type-params.rs:16:6
|
LL | fn f<T>(val: T) {
| ^
= note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
= note: required for the cast to the object type `dyn Gettable<T>`
error[E0277]: `T` cannot be sent between threads safely
--> $DIR/kindck-impl-type-params.rs:25:31
|
LL | fn g<T>(val: T) {
| - help: consider restricting this bound: `T: std::marker::Send`
LL | let t: S<T> = S(marker::PhantomData);
LL | let a: &dyn Gettable<T> = &t;
| ^^ `T` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `T`
help: consider restricting this type parameter with `T: std::marker::Send`
--> $DIR/kindck-impl-type-params.rs:23:6
|
LL | fn g<T>(val: T) {
| ^
= note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
= note: required for the cast to the object type `dyn Gettable<T>`
error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
--> $DIR/kindck-impl-type-params.rs:25:31
|
LL | fn g<T>(val: T) {
| - help: consider restricting this bound: `T: std::marker::Copy`
LL | let t: S<T> = S(marker::PhantomData);
LL | let a: &dyn Gettable<T> = &t;
| ^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/kindck-impl-type-params.rs:23:6
|
LL | fn g<T>(val: T) {
| ^
= note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
= note: required for the cast to the object type `dyn Gettable<T>`

10
src/test/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr
View File

@ -11,13 +11,17 @@ error[E0382]: borrow of moved value: `f`
--> $DIR/moves-based-on-type-no-recursive-stack-closure.rs:32:5
|
LL | fn conspirator<F>(mut f: F) where F: FnMut(&mut R, bool) {
| ----- - help: consider further restricting type parameter `F`: `, F: Copy`
| |
| move occurs because `f` has type `F`, which does not implement the `Copy` trait
| ----- move occurs because `f` has type `F`, which does not implement the `Copy` trait
LL | let mut r = R {c: Box::new(f)};
| - value moved here
LL | f(&mut r, false)
| ^ value borrowed here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/moves-based-on-type-no-recursive-stack-closure.rs:30:35
|
LL | fn conspirator<F>(mut f: F) where F: FnMut(&mut R, bool) {
| ^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 2 previous errors

10
src/test/ui/once-cant-call-twice-on-heap.stderr
View File

@ -2,13 +2,17 @@ error[E0382]: use of moved value: `blk`
--> $DIR/once-cant-call-twice-on-heap.rs:9:5
|
LL | fn foo<F:FnOnce()>(blk: F) {
| -- --- move occurs because `blk` has type `F`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `F: Copy +`
| --- move occurs because `blk` has type `F`, which does not implement the `Copy` trait
LL | blk();
| --- value moved here
LL | blk();
| ^^^ value used here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/once-cant-call-twice-on-heap.rs:7:10
|
LL | fn foo<F:FnOnce()>(blk: F) {
| ^^^^^^^^
error: aborting due to previous error

16
src/test/ui/phantom-oibit.stderr
View File

@ -3,13 +3,16 @@ error[E0277]: `T` cannot be shared between threads safely
|
LL | fn is_zen<T: Zen>(_: T) {}
| ------ --- required by this bound in `is_zen`
LL |
LL | fn not_sync<T>(x: Guard<T>) {
| - help: consider restricting this bound: `T: std::marker::Sync`
...
LL | is_zen(x)
| ^ `T` cannot be shared between threads safely
|
= help: the trait `std::marker::Sync` is not implemented for `T`
help: consider restricting this type parameter with `T: std::marker::Sync`
--> $DIR/phantom-oibit.rs:20:13
|
LL | fn not_sync<T>(x: Guard<T>) {
| ^
= note: required because of the requirements on the impl of `Zen` for `&T`
= note: required because it appears within the type `std::marker::PhantomData<&T>`
= note: required because it appears within the type `Guard<'_, T>`
@ -20,12 +23,15 @@ error[E0277]: `T` cannot be shared between threads safely
LL | fn is_zen<T: Zen>(_: T) {}
| ------ --- required by this bound in `is_zen`
...
LL | fn nested_not_sync<T>(x: Nested<Guard<T>>) {
| - help: consider restricting this bound: `T: std::marker::Sync`
LL | is_zen(x)
| ^ `T` cannot be shared between threads safely
|
= help: the trait `std::marker::Sync` is not implemented for `T`
help: consider restricting this type parameter with `T: std::marker::Sync`
--> $DIR/phantom-oibit.rs:25:20
|
LL | fn nested_not_sync<T>(x: Nested<Guard<T>>) {
| ^
= note: required because of the requirements on the impl of `Zen` for `&T`
= note: required because it appears within the type `std::marker::PhantomData<&T>`
= note: required because it appears within the type `Guard<'_, T>`

10
src/test/ui/specialization/defaultimpl/specialization-wfcheck.stderr
View File

@ -2,9 +2,13 @@ error[E0277]: the trait bound `U: std::cmp::Eq` is not satisfied
--> $DIR/specialization-wfcheck.rs:7:17
|
LL | default impl<U> Foo<'static, U> for () {}
| - ^^^^^^^^^^^^^^^ the trait `std::cmp::Eq` is not implemented for `U`
| |
| help: consider restricting this bound: `U: std::cmp::Eq`
| ^^^^^^^^^^^^^^^ the trait `std::cmp::Eq` is not implemented for `U`
|
help: consider restricting this type parameter with `U: std::cmp::Eq`
--> $DIR/specialization-wfcheck.rs:7:14
|
LL | default impl<U> Foo<'static, U> for () {}
| ^
error: aborting due to previous error

54
src/test/ui/suggestions/restrict-type-argument.stderr
View File

@ -3,13 +3,16 @@ error[E0277]: `impl Sync` cannot be sent between threads safely
|
LL | fn is_send<T: Send>(val: T) {}
| ------- ---- required by this bound in `is_send`
LL |
LL | fn use_impl_sync(val: impl Sync) {
| --------- help: consider further restricting this bound: `impl Sync + std::marker::Send`
...
LL | is_send(val);
| ^^^ `impl Sync` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `impl Sync`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/restrict-type-argument.rs:3:23
|
LL | fn use_impl_sync(val: impl Sync) {
| ^^^^^^^^^
error[E0277]: `S` cannot be sent between threads safely
--> $DIR/restrict-type-argument.rs:8:13
@ -17,12 +20,15 @@ error[E0277]: `S` cannot be sent between threads safely
LL | fn is_send<T: Send>(val: T) {}
| ------- ---- required by this bound in `is_send`
...
LL | fn use_where<S>(val: S) where S: Sync {
| - help: consider further restricting type parameter `S`: `, S: std::marker::Send`
LL | is_send(val);
| ^^^ `S` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `S`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/restrict-type-argument.rs:7:31
|
LL | fn use_where<S>(val: S) where S: Sync {
| ^^^^^^^
error[E0277]: `S` cannot be sent between threads safely
--> $DIR/restrict-type-argument.rs:12:13
@ -30,27 +36,31 @@ error[E0277]: `S` cannot be sent between threads safely
LL | fn is_send<T: Send>(val: T) {}
| ------- ---- required by this bound in `is_send`
...
LL | fn use_bound<S: Sync>(val: S) {
| -- help: consider further restricting this bound: `S: std::marker::Send +`
LL | is_send(val);
| ^^^ `S` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `S`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/restrict-type-argument.rs:11:17
|
LL | fn use_bound<S: Sync>(val: S) {
| ^^^^
error[E0277]: `S` cannot be sent between threads safely
--> $DIR/restrict-type-argument.rs:20:13
|
LL | fn is_send<T: Send>(val: T) {}
| ------- ---- required by this bound in `is_send`
LL | fn is_send<T: Send>(val: T) {}
| ------- ---- required by this bound in `is_send`
...
LL | / S // Make sure we can synthezise a correct suggestion span for this case
LL | | :
| |_____- help: consider further restricting this bound: `S: std::marker::Send +`
...
LL | is_send(val);
| ^^^ `S` cannot be sent between threads safely
LL | is_send(val);
| ^^^ `S` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `S`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/restrict-type-argument.rs:18:5
|
LL | Sync
| ^^^^
error[E0277]: `S` cannot be sent between threads safely
--> $DIR/restrict-type-argument.rs:24:13
@ -58,12 +68,15 @@ error[E0277]: `S` cannot be sent between threads safely
LL | fn is_send<T: Send>(val: T) {}
| ------- ---- required by this bound in `is_send`
...
LL | fn use_bound_and_where<S: Sync>(val: S) where S: std::fmt::Debug {
| - help: consider further restricting type parameter `S`: `, S: std::marker::Send`
LL | is_send(val);
| ^^^ `S` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `S`
help: consider further restricting this bound with `+ std::marker::Send`
--> $DIR/restrict-type-argument.rs:23:47
|
LL | fn use_bound_and_where<S: Sync>(val: S) where S: std::fmt::Debug {
| ^^^^^^^^^^^^^^^^^^
error[E0277]: `S` cannot be sent between threads safely
--> $DIR/restrict-type-argument.rs:28:13
@ -71,12 +84,15 @@ error[E0277]: `S` cannot be sent between threads safely
LL | fn is_send<T: Send>(val: T) {}
| ------- ---- required by this bound in `is_send`
...
LL | fn use_unbound<S>(val: S) {
| - help: consider restricting this bound: `S: std::marker::Send`
LL | is_send(val);
| ^^^ `S` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `S`
help: consider restricting this type parameter with `S: std::marker::Send`
--> $DIR/restrict-type-argument.rs:27:16
|
LL | fn use_unbound<S>(val: S) {
| ^
error: aborting due to 6 previous errors

2
src/test/ui/suggestions/suggest-remove-refs-1.stderr
View File

@ -5,7 +5,7 @@ LL | for (i, n) in &v.iter().enumerate() {
| -^^^^^^^^^^^^^^^^^^^^
| |
| `&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator
| help: consider removing 1 leading `&`-references
| help: consider removing the leading `&`-reference
|
= help: the trait `std::iter::Iterator` is not implemented for `&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>`
= note: required by `std::iter::IntoIterator::into_iter`

10
src/test/ui/traits/trait-alias/trait-alias-wf.stderr
View File

@ -4,9 +4,13 @@ error[E0277]: the trait bound `T: Foo` is not satisfied
LL | trait A<T: Foo> {}
| --------------- required by `A`
LL | trait B<T> = A<T>;
| - ^^^^ the trait `Foo` is not implemented for `T`
| |
| help: consider restricting this bound: `T: Foo`
| ^^^^ the trait `Foo` is not implemented for `T`
|
help: consider restricting this type parameter with `T: Foo`
--> $DIR/trait-alias-wf.rs:5:9
|
LL | trait B<T> = A<T>;
| ^
error: aborting due to previous error

26
src/test/ui/traits/trait-bounds-on-structs-and-enums.stderr
View File

@ -5,9 +5,13 @@ LL | struct Foo<T:Trait> {
| ------------------- required by `Foo`
...
LL | impl<T> Foo<T> {
| - ^^^^^^ the trait `Trait` is not implemented for `T`
| |
| help: consider restricting this bound: `T: Trait`
| ^^^^^^ the trait `Trait` is not implemented for `T`
|
help: consider restricting this type parameter with `T: Trait`
--> $DIR/trait-bounds-on-structs-and-enums.rs:13:6
|
LL | impl<T> Foo<T> {
| ^
error[E0277]: the trait bound `isize: Trait` is not satisfied
--> $DIR/trait-bounds-on-structs-and-enums.rs:19:5
@ -33,10 +37,14 @@ error[E0277]: the trait bound `U: Trait` is not satisfied
LL | struct Foo<T:Trait> {
| ------------------- required by `Foo`
...
LL | struct Badness<U> {
| - help: consider restricting this bound: `U: Trait`
LL | b: Foo<U>,
| ^^^^^^^^^ the trait `Trait` is not implemented for `U`
|
help: consider restricting this type parameter with `U: Trait`
--> $DIR/trait-bounds-on-structs-and-enums.rs:26:16
|
LL | struct Badness<U> {
| ^
error[E0277]: the trait bound `V: Trait` is not satisfied
--> $DIR/trait-bounds-on-structs-and-enums.rs:31:21
@ -44,10 +52,14 @@ error[E0277]: the trait bound `V: Trait` is not satisfied
LL | enum Bar<T:Trait> {
| ----------------- required by `Bar`
...
LL | enum MoreBadness<V> {
| - help: consider restricting this bound: `V: Trait`
LL | EvenMoreBadness(Bar<V>),
| ^^^^^^ the trait `Trait` is not implemented for `V`
|
help: consider restricting this type parameter with `V: Trait`
--> $DIR/trait-bounds-on-structs-and-enums.rs:30:18
|
LL | enum MoreBadness<V> {
| ^
error[E0277]: the trait bound `i32: Trait` is not satisfied
--> $DIR/trait-bounds-on-structs-and-enums.rs:35:5

16
src/test/ui/traits/traits-repeated-supertrait-ambig.stderr
View File

@ -7,10 +7,14 @@ LL | c.same_as(22)
error[E0277]: the trait bound `C: CompareTo<i32>` is not satisfied
--> $DIR/traits-repeated-supertrait-ambig.rs:30:7
|
LL | fn with_trait<C:CompareToInts>(c: &C) -> bool {
| -- help: consider further restricting this bound: `C: CompareTo<i32> +`
LL | c.same_as(22)
| ^^^^^^^ the trait `CompareTo<i32>` is not implemented for `C`
|
help: consider further restricting this bound with `+ CompareTo<i32>`
--> $DIR/traits-repeated-supertrait-ambig.rs:29:17
|
LL | fn with_trait<C:CompareToInts>(c: &C) -> bool {
| ^^^^^^^^^^^^^
error[E0277]: the trait bound `dyn CompareToInts: CompareTo<i32>` is not satisfied
--> $DIR/traits-repeated-supertrait-ambig.rs:34:5
@ -27,10 +31,14 @@ error[E0277]: the trait bound `C: CompareTo<i32>` is not satisfied
LL | fn same_as(&self, t: T) -> bool;
| -------------------------------- required by `CompareTo::same_as`
...
LL | fn with_ufcs2<C:CompareToInts>(c: &C) -> bool {
| -- help: consider further restricting this bound: `C: CompareTo<i32> +`
LL | CompareTo::same_as(c, 22)
| ^^^^^^^^^^^^^^^^^^ the trait `CompareTo<i32>` is not implemented for `C`
|
help: consider further restricting this bound with `+ CompareTo<i32>`
--> $DIR/traits-repeated-supertrait-ambig.rs:37:17
|
LL | fn with_ufcs2<C:CompareToInts>(c: &C) -> bool {
| ^^^^^^^^^^^^^
error[E0277]: the trait bound `i64: CompareTo<i32>` is not satisfied
--> $DIR/traits-repeated-supertrait-ambig.rs:42:23

7
src/test/ui/type-alias-impl-trait/bound_reduction2.stderr
View File

@ -3,9 +3,12 @@ error[E0277]: the trait bound `T: TraitWithAssoc` is not satisfied
|
LL | type Foo<V> = impl Trait<V>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `TraitWithAssoc` is not implemented for `T`
...
|
help: consider further restricting this bound with `+ TraitWithAssoc`
--> $DIR/bound_reduction2.rs:18:21
|
LL | fn foo_desugared<T: TraitWithAssoc>(_: T) -> Foo<T::Assoc> {
| -- help: consider further restricting this bound: `T: TraitWithAssoc +`
| ^^^^^^^^^^^^^^
error: defining opaque type use does not fully define opaque type: generic parameter `V` is specified as concrete type `<T as TraitWithAssoc>::Assoc`
--> $DIR/bound_reduction2.rs:18:1

8
src/test/ui/type-alias-impl-trait/generic_underconstrained.stderr
View File

@ -9,10 +9,12 @@ error[E0277]: the trait bound `T: Trait` is not satisfied
|
LL | type Underconstrained<T: Trait> = impl 'static;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait` is not implemented for `T`
...
LL | fn underconstrain<T>(_: T) -> Underconstrained<T> {
| - help: consider restricting this bound: `T: Trait`
|
help: consider restricting this type parameter with `T: Trait`
--> $DIR/generic_underconstrained.rs:10:19
|
LL | fn underconstrain<T>(_: T) -> Underconstrained<T> {
| ^
= note: the return type of a function must have a statically known size
error: aborting due to 2 previous errors

14
src/test/ui/type-alias-impl-trait/generic_underconstrained2.stderr
View File

@ -16,12 +16,15 @@ error[E0277]: `U` doesn't implement `std::fmt::Debug`
LL | type Underconstrained<T: std::fmt::Debug> = impl 'static;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `U` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
...
LL | fn underconstrained<U>(_: U) -> Underconstrained<U> {
| - help: consider restricting this bound: `U: std::fmt::Debug`
LL | 5u32
| ---- this returned value is of type `u32`
|
= help: the trait `std::fmt::Debug` is not implemented for `U`
help: consider restricting this type parameter with `U: std::fmt::Debug`
--> $DIR/generic_underconstrained2.rs:10:21
|
LL | fn underconstrained<U>(_: U) -> Underconstrained<U> {
| ^
= note: the return type of a function must have a statically known size
error[E0277]: `V` doesn't implement `std::fmt::Debug`
@ -30,12 +33,15 @@ error[E0277]: `V` doesn't implement `std::fmt::Debug`
LL | type Underconstrained2<T: std::fmt::Debug> = impl 'static;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `V` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
...
LL | fn underconstrained2<U, V>(_: U, _: V) -> Underconstrained2<V> {
| - help: consider restricting this bound: `V: std::fmt::Debug`
LL | 5u32
| ---- this returned value is of type `u32`
|
= help: the trait `std::fmt::Debug` is not implemented for `V`
help: consider restricting this type parameter with `V: std::fmt::Debug`
--> $DIR/generic_underconstrained2.rs:19:25
|
LL | fn underconstrained2<U, V>(_: U, _: V) -> Underconstrained2<V> {
| ^
= note: the return type of a function must have a statically known size
error: aborting due to 4 previous errors

10
src/test/ui/type/type-check-defaults.stderr
View File

@ -52,9 +52,13 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
LL | trait Super<T: Copy> { }
| -------------------- required by `Super`
LL | trait Base<T = String>: Super<T> { }
| - ^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
| |
| help: consider restricting this bound: `T: std::marker::Copy`
| ^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/type-check-defaults.rs:21:12
|
LL | trait Base<T = String>: Super<T> { }
| ^
error[E0277]: cannot add `u8` to `i32`
--> $DIR/type-check-defaults.rs:24:66

7
src/test/ui/typeck/typeck-default-trait-impl-send-param.stderr
View File

@ -1,8 +1,6 @@
error[E0277]: `T` cannot be sent between threads safely
--> $DIR/typeck-default-trait-impl-send-param.rs:5:15
|
LL | fn foo<T>() {
| - help: consider restricting this bound: `T: std::marker::Send`
LL | is_send::<T>()
| ^ `T` cannot be sent between threads safely
...
@ -10,6 +8,11 @@ LL | fn is_send<T:Send>() {
| ------- ---- required by this bound in `is_send`
|
= help: the trait `std::marker::Send` is not implemented for `T`
help: consider restricting this type parameter with `T: std::marker::Send`
--> $DIR/typeck-default-trait-impl-send-param.rs:4:8
|
LL | fn foo<T>() {
| ^
error: aborting due to previous error

4
src/test/ui/typeck/typeck_type_placeholder_item.stderr
View File

@ -300,10 +300,10 @@ LL | b: (T, T),
|
error[E0282]: type annotations needed
--> $DIR/typeck_type_placeholder_item.rs:127:27
--> $DIR/typeck_type_placeholder_item.rs:127:18
|
LL | fn fn_test11(_: _) -> (_, _) { panic!() }
| ^^^^^^ cannot infer type
| ^ cannot infer type
error[E0121]: the type placeholder `_` is not allowed within types on item signatures
--> $DIR/typeck_type_placeholder_item.rs:127:28

10
src/test/ui/unop-move-semantics.stderr
View File

@ -2,14 +2,18 @@ error[E0382]: borrow of moved value: `x`
--> $DIR/unop-move-semantics.rs:8:5
|
LL | fn move_then_borrow<T: Not<Output=T> + Clone>(x: T) {
| -- - move occurs because `x` has type `T`, which does not implement the `Copy` trait
| |
| help: consider further restricting this bound: `T: Copy +`
| - move occurs because `x` has type `T`, which does not implement the `Copy` trait
LL | !x;
| - value moved here
LL |
LL | x.clone();
| ^ value borrowed here after move
|
help: consider further restricting this bound with `+ Copy`
--> $DIR/unop-move-semantics.rs:5:24
|
LL | fn move_then_borrow<T: Not<Output=T> + Clone>(x: T) {
| ^^^^^^^^^^^^^^^^^^^^^
error[E0505]: cannot move out of `x` because it is borrowed
--> $DIR/unop-move-semantics.rs:15:6

10
src/test/ui/wf/wf-enum-bound.stderr
View File

@ -5,9 +5,13 @@ LL | trait ExtraCopy<T:Copy> { }
| ----------------------- required by `ExtraCopy`
...
LL | where T: ExtraCopy<U>
| ^^^^^^^^^^^^- help: consider further restricting type parameter `U`: `, U: std::marker::Copy`
| |
| the trait `std::marker::Copy` is not implemented for `U`
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `U`
|
help: consider restricting this type parameter with `where U: std::marker::Copy`
--> $DIR/wf-enum-bound.rs:9:17
|
LL | enum SomeEnum<T,U>
| ^
error: aborting due to previous error

9
src/test/ui/wf/wf-enum-fields-struct-variant.stderr
View File

@ -4,11 +4,14 @@ error[E0277]: the trait bound `A: std::marker::Copy` is not satisfied
LL | struct IsCopy<T:Copy> {
| --------------------- required by `IsCopy`
...
LL | enum AnotherEnum<A> {
| - help: consider restricting this bound: `A: std::marker::Copy`
LL | AnotherVariant {
LL | f: IsCopy<A>
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `A`
|
help: consider restricting this type parameter with `A: std::marker::Copy`
--> $DIR/wf-enum-fields-struct-variant.rs:11:18
|
LL | enum AnotherEnum<A> {
| ^
error: aborting due to previous error

8
src/test/ui/wf/wf-enum-fields.stderr
View File

@ -4,10 +4,14 @@ error[E0277]: the trait bound `A: std::marker::Copy` is not satisfied
LL | struct IsCopy<T:Copy> {
| --------------------- required by `IsCopy`
...
LL | enum SomeEnum<A> {
| - help: consider restricting this bound: `A: std::marker::Copy`
LL | SomeVariant(IsCopy<A>)
| ^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `A`
|
help: consider restricting this type parameter with `A: std::marker::Copy`
--> $DIR/wf-enum-fields.rs:11:15
|
LL | enum SomeEnum<A> {
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-fn-where-clause.stderr
View File

@ -5,9 +5,13 @@ LL | trait ExtraCopy<T:Copy> { }
| ----------------------- required by `ExtraCopy`
LL |
LL | fn foo<T,U>() where T: ExtraCopy<U>
| ^^^^^^^^^^^^- help: consider further restricting type parameter `U`: `, U: std::marker::Copy`
| |
| the trait `std::marker::Copy` is not implemented for `U`
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `U`
|
help: consider restricting this type parameter with `where U: std::marker::Copy`
--> $DIR/wf-fn-where-clause.rs:8:10
|
LL | fn foo<T,U>() where T: ExtraCopy<U>
| ^
error[E0277]: the size for values of type `(dyn std::marker::Copy + 'static)` cannot be known at compilation time
--> $DIR/wf-fn-where-clause.rs:12:16

8
src/test/ui/wf/wf-impl-associated-type-trait.stderr
View File

@ -4,10 +4,14 @@ error[E0277]: the trait bound `T: MyHash` is not satisfied
LL | pub struct MySet<T:MyHash> {
| -------------------------- required by `MySet`
...
LL | impl<T> Foo for T {
| - help: consider restricting this bound: `T: MyHash`
LL | type Bar = MySet<T>;
| ^^^^^^^^^^^^^^^^^^^^ the trait `MyHash` is not implemented for `T`
|
help: consider restricting this type parameter with `T: MyHash`
--> $DIR/wf-impl-associated-type-trait.rs:16:6
|
LL | impl<T> Foo for T {
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-in-fn-arg.stderr
View File

@ -5,9 +5,13 @@ LL | struct MustBeCopy<T:Copy> {
| ------------------------- required by `MustBeCopy`
...
LL | fn bar<T>(_: &MustBeCopy<T>)
| - ^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
| |
| help: consider restricting this bound: `T: std::marker::Copy`
| ^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/wf-in-fn-arg.rs:10:8
|
LL | fn bar<T>(_: &MustBeCopy<T>)
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-in-fn-ret.stderr
View File

@ -5,9 +5,13 @@ LL | struct MustBeCopy<T:Copy> {
| ------------------------- required by `MustBeCopy`
...
LL | fn bar<T>() -> MustBeCopy<T>
| - ^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
| |
| help: consider restricting this bound: `T: std::marker::Copy`
| ^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/wf-in-fn-ret.rs:10:8
|
LL | fn bar<T>() -> MustBeCopy<T>
| ^
error: aborting due to previous error

9
src/test/ui/wf/wf-in-fn-type-arg.stderr
View File

@ -4,11 +4,14 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
LL | struct MustBeCopy<T:Copy> {
| ------------------------- required by `MustBeCopy`
...
LL | struct Bar<T> {
| - help: consider restricting this bound: `T: std::marker::Copy`
LL | // needs T: Copy
LL | x: fn(MustBeCopy<T>)
| ^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/wf-in-fn-type-arg.rs:7:12
|
LL | struct Bar<T> {
| ^
error: aborting due to previous error

9
src/test/ui/wf/wf-in-fn-type-ret.stderr
View File

@ -4,11 +4,14 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
LL | struct MustBeCopy<T:Copy> {
| ------------------------- required by `MustBeCopy`
...
LL | struct Foo<T> {
| - help: consider restricting this bound: `T: std::marker::Copy`
LL | // needs T: 'static
LL | x: fn() -> MustBeCopy<T>
| ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/wf-in-fn-type-ret.rs:7:12
|
LL | struct Foo<T> {
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-in-fn-where-clause.stderr
View File

@ -5,9 +5,13 @@ LL | trait MustBeCopy<T:Copy> {
| ------------------------ required by `MustBeCopy`
...
LL | where T: MustBeCopy<U>
| ^^^^^^^^^^^^^- help: consider further restricting type parameter `U`: `, U: std::marker::Copy`
| |
| the trait `std::marker::Copy` is not implemented for `U`
| ^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `U`
|
help: consider restricting this type parameter with `where U: std::marker::Copy`
--> $DIR/wf-in-fn-where-clause.rs:9:10
|
LL | fn bar<T,U>()
| ^
error: aborting due to previous error

9
src/test/ui/wf/wf-in-obj-type-trait.stderr
View File

@ -4,11 +4,14 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
LL | struct MustBeCopy<T:Copy> {
| ------------------------- required by `MustBeCopy`
...
LL | struct Bar<T> {
| - help: consider restricting this bound: `T: std::marker::Copy`
LL | // needs T: Copy
LL | x: dyn Object<MustBeCopy<T>>
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/wf-in-obj-type-trait.rs:9:12
|
LL | struct Bar<T> {
| ^
error: aborting due to previous error

8
src/test/ui/wf/wf-inherent-impl-method-where-clause.stderr
View File

@ -4,10 +4,14 @@ error[E0277]: the trait bound `U: std::marker::Copy` is not satisfied
LL | trait ExtraCopy<T:Copy> { }
| ----------------------- required by `ExtraCopy`
...
LL | impl<T,U> Foo<T,U> {
| - help: consider restricting this bound: `U: std::marker::Copy`
LL | fn foo(self) where T: ExtraCopy<U>
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `U`
|
help: consider restricting this type parameter with `U: std::marker::Copy`
--> $DIR/wf-inherent-impl-method-where-clause.rs:11:8
|
LL | impl<T,U> Foo<T,U> {
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-inherent-impl-where-clause.stderr
View File

@ -5,9 +5,13 @@ LL | trait ExtraCopy<T:Copy> { }
| ----------------------- required by `ExtraCopy`
...
LL | impl<T,U> Foo<T,U> where T: ExtraCopy<U>
| ^^^^^^^^^^^^- help: consider further restricting type parameter `U`: `, U: std::marker::Copy`
| |
| the trait `std::marker::Copy` is not implemented for `U`
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `U`
|
help: consider restricting this type parameter with `where U: std::marker::Copy`
--> $DIR/wf-inherent-impl-where-clause.rs:11:8
|
LL | impl<T,U> Foo<T,U> where T: ExtraCopy<U>
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-struct-bound.stderr
View File

@ -5,9 +5,13 @@ LL | trait ExtraCopy<T:Copy> { }
| ----------------------- required by `ExtraCopy`
...
LL | where T: ExtraCopy<U>
| ^^^^^^^^^^^^- help: consider further restricting type parameter `U`: `, U: std::marker::Copy`
| |
| the trait `std::marker::Copy` is not implemented for `U`
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `U`
|
help: consider restricting this type parameter with `where U: std::marker::Copy`
--> $DIR/wf-struct-bound.rs:9:21
|
LL | struct SomeStruct<T,U>
| ^
error: aborting due to previous error

8
src/test/ui/wf/wf-struct-field.stderr
View File

@ -4,10 +4,14 @@ error[E0277]: the trait bound `A: std::marker::Copy` is not satisfied
LL | struct IsCopy<T:Copy> {
| --------------------- required by `IsCopy`
...
LL | struct SomeStruct<A> {
| - help: consider restricting this bound: `A: std::marker::Copy`
LL | data: IsCopy<A>
| ^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `A`
|
help: consider restricting this type parameter with `A: std::marker::Copy`
--> $DIR/wf-struct-field.rs:11:19
|
LL | struct SomeStruct<A> {
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-trait-associated-type-bound.stderr
View File

@ -3,11 +3,15 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
|
LL | trait ExtraCopy<T:Copy> { }
| ----------------------- required by `ExtraCopy`
LL |
LL | trait SomeTrait<T> {
| - help: consider restricting this bound: `T: std::marker::Copy`
...
LL | type Type1: ExtraCopy<T>;
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/wf-trait-associated-type-bound.rs:9:17
|
LL | trait SomeTrait<T> {
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-trait-bound.stderr
View File

@ -5,9 +5,13 @@ LL | trait ExtraCopy<T:Copy> { }
| ----------------------- required by `ExtraCopy`
...
LL | where T: ExtraCopy<U>
| ^^^^^^^^^^^^- help: consider further restricting type parameter `U`: `, U: std::marker::Copy`
| |
| the trait `std::marker::Copy` is not implemented for `U`
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `U`
|
help: consider restricting this type parameter with `where U: std::marker::Copy`
--> $DIR/wf-trait-bound.rs:9:19
|
LL | trait SomeTrait<T,U>
| ^
error: aborting due to previous error

10
src/test/ui/wf/wf-trait-superbound.stderr
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@ -5,9 +5,13 @@ LL | trait ExtraCopy<T:Copy> { }
| ----------------------- required by `ExtraCopy`
LL |
LL | trait SomeTrait<T>: ExtraCopy<T> {
| - ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
| |
| help: consider restricting this bound: `T: std::marker::Copy`
| ^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/wf-trait-superbound.rs:9:17
|
LL | trait SomeTrait<T>: ExtraCopy<T> {
| ^
error: aborting due to previous error

9
src/test/ui/where-clauses/where-clause-constraints-are-local-for-inherent-impl.stderr
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@ -4,11 +4,14 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
LL | fn require_copy<T: Copy>(x: T) {}
| ------------ ---- required by this bound in `require_copy`
...
LL | impl<T> Foo<T> {
| - help: consider restricting this bound: `T: std::marker::Copy`
...
LL | require_copy(self.x);
| ^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/where-clause-constraints-are-local-for-inherent-impl.rs:6:6
|
LL | impl<T> Foo<T> {
| ^
error: aborting due to previous error

9
src/test/ui/where-clauses/where-clause-constraints-are-local-for-trait-impl.stderr
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@ -4,11 +4,14 @@ error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
LL | fn require_copy<T: Copy>(x: T) {}
| ------------ ---- required by this bound in `require_copy`
...
LL | impl<T> Foo<T> for Bar<T> {
| - help: consider restricting this bound: `T: std::marker::Copy`
...
LL | require_copy(self.x);
| ^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
|
help: consider restricting this type parameter with `T: std::marker::Copy`
--> $DIR/where-clause-constraints-are-local-for-trait-impl.rs:11:6
|
LL | impl<T> Foo<T> for Bar<T> {
| ^
error: aborting due to previous error