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Note closure kind mismatch cause

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This commit is contained in:
Michael Goulet 2022-08-18 12:22:07 +00:00
parent 52e2065ed4
commit 70b29f7c2d
9 changed files with 79 additions and 10 deletions
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3
compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs
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@ -860,8 +860,7 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
}
}
err.emit();
return;
err
}
ty::PredicateKind::WellFormed(ty) => {

2
src/test/ui/closure_context/issue-26046-fn-mut.stderr
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@ -8,6 +8,8 @@ LL | num += 1;
...
LL | Box::new(closure)
| ----------------- the requirement to implement `Fn` derives from here
|
= note: required for the cast from `[closure@$DIR/issue-26046-fn-mut.rs:4:19: 4:21]` to the object type `dyn Fn()`
error: aborting due to previous error

2
src/test/ui/closure_context/issue-26046-fn-once.stderr
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@ -8,6 +8,8 @@ LL | vec
...
LL | Box::new(closure)
| ----------------- the requirement to implement `Fn` derives from here
|
= note: required for the cast from `[closure@$DIR/issue-26046-fn-once.rs:4:19: 4:26]` to the object type `dyn Fn() -> Vec<u8>`
error: aborting due to previous error

10
src/test/ui/closures/2229_closure_analysis/diagnostics/closure-origin-array-diagnostics.stderr
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@ -7,7 +7,15 @@ LL | let [_, _s] = s;
| - closure is `FnOnce` because it moves the variable `s` out of its environment
LL | };
LL | expect_fn(c);
| - the requirement to implement `Fn` derives from here
| --------- - the requirement to implement `Fn` derives from here
| |
| required by a bound introduced by this call
|
note: required by a bound in `expect_fn`
--> $DIR/closure-origin-array-diagnostics.rs:5:17
|
LL | fn expect_fn<F: Fn()>(_f: F) {}
| ^^^^ required by this bound in `expect_fn`
error: aborting due to previous error

10
src/test/ui/closures/2229_closure_analysis/diagnostics/closure-origin-tuple-diagnostics.stderr
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@ -7,7 +7,15 @@ LL | let s = s.1;
| --- closure is `FnOnce` because it moves the variable `s.1` out of its environment
LL | };
LL | expect_fn(c);
| - the requirement to implement `Fn` derives from here
| --------- - the requirement to implement `Fn` derives from here
| |
| required by a bound introduced by this call
|
note: required by a bound in `expect_fn`
--> $DIR/closure-origin-tuple-diagnostics.rs:5:17
|
LL | fn expect_fn<F: Fn()>(_f: F) {}
| ^^^^ required by this bound in `expect_fn`
error: aborting due to previous error

10
src/test/ui/closures/closure-wrong-kind.stderr
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@ -6,7 +6,15 @@ LL | let closure = |_| foo(x);
| |
| this closure implements `FnOnce`, not `Fn`
LL | bar(closure);
| ------- the requirement to implement `Fn` derives from here
| --- ------- the requirement to implement `Fn` derives from here
| |
| required by a bound introduced by this call
|
note: required by a bound in `bar`
--> $DIR/closure-wrong-kind.rs:6:11
|
LL | fn bar<T: Fn(u32)>(_: T) {}
| ^^^^^^^ required by this bound in `bar`
error: aborting due to previous error

10
src/test/ui/issues/issue-34349.stderr
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@ -7,7 +7,15 @@ LL | farewell.push_str("!!!");
| -------- closure is `FnMut` because it mutates the variable `farewell` here
...
LL | apply(diary);
| ----- the requirement to implement `Fn` derives from here
| ----- ----- the requirement to implement `Fn` derives from here
| |
| required by a bound introduced by this call
|
note: required by a bound in `apply`
--> $DIR/issue-34349.rs:11:32
|
LL | fn apply<F>(f: F) where F: Fn() {
| ^^^^ required by this bound in `apply`
error: aborting due to previous error

30
src/test/ui/pattern/move-ref-patterns/move-ref-patterns-closure-captures.stderr
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@ -8,7 +8,15 @@ LL | drop::<U>(_x1);
| --- closure is `FnOnce` because it moves the variable `_x1` out of its environment
...
LL | accept_fn_mut(&c1);
| --- the requirement to implement `FnMut` derives from here
| ------------- --- the requirement to implement `FnMut` derives from here
| |
| required by a bound introduced by this call
|
note: required by a bound in `accept_fn_mut`
--> $DIR/move-ref-patterns-closure-captures.rs:4:31
|
LL | fn accept_fn_mut(_: &impl FnMut()) {}
| ^^^^^^^ required by this bound in `accept_fn_mut`
error[E0525]: expected a closure that implements the `Fn` trait, but this closure only implements `FnOnce`
--> $DIR/move-ref-patterns-closure-captures.rs:9:14
@ -20,7 +28,15 @@ LL | drop::<U>(_x1);
| --- closure is `FnOnce` because it moves the variable `_x1` out of its environment
...
LL | accept_fn(&c1);
| --- the requirement to implement `Fn` derives from here
| --------- --- the requirement to implement `Fn` derives from here
| |
| required by a bound introduced by this call
|
note: required by a bound in `accept_fn`
--> $DIR/move-ref-patterns-closure-captures.rs:5:27
|
LL | fn accept_fn(_: &impl Fn()) {}
| ^^^^ required by this bound in `accept_fn`
error[E0525]: expected a closure that implements the `Fn` trait, but this closure only implements `FnMut`
--> $DIR/move-ref-patterns-closure-captures.rs:20:14
@ -32,7 +48,15 @@ LL | drop::<&mut U>(_x2);
| --- closure is `FnMut` because it mutates the variable `_x2` here
...
LL | accept_fn(&c2);
| --- the requirement to implement `Fn` derives from here
| --------- --- the requirement to implement `Fn` derives from here
| |
| required by a bound introduced by this call
|
note: required by a bound in `accept_fn`
--> $DIR/move-ref-patterns-closure-captures.rs:5:27
|
LL | fn accept_fn(_: &impl Fn()) {}
| ^^^^ required by this bound in `accept_fn`
error: aborting due to 3 previous errors

12
src/test/ui/unboxed-closures/unboxed-closures-infer-fn-once-move-from-projection.stderr
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@ -6,7 +6,17 @@ LL | let c = || drop(y.0);
| |
| this closure implements `FnOnce`, not `Fn`
LL | foo(c);
| - the requirement to implement `Fn` derives from here
| --- - the requirement to implement `Fn` derives from here
| |
| required by a bound introduced by this call
|
note: required by a bound in `foo`
--> $DIR/unboxed-closures-infer-fn-once-move-from-projection.rs:4:14
|
LL | fn foo<F>(f: F)
| --- required by a bound in this
LL | where F: Fn()
| ^^^^ required by this bound in `foo`
error: aborting due to previous error