mirror of https://github.com/rust-lang/rust
4aba2c55e6
Start pointing to where bindings were declared when they are captured in closures:
```
error[E0597]: `x` does not live long enough
--> $DIR/suggest-return-closure.rs:23:9
|
LL | let x = String::new();
| - binding `x` declared here
...
LL | |c| {
| --- value captured here
LL | x.push(c);
| ^ borrowed value does not live long enough
...
LL | }
| -- borrow later used here
| |
| `x` dropped here while still borrowed
```
Suggest cloning in more cases involving closures:
```
error[E0507]: cannot move out of `foo` in pattern guard
--> $DIR/issue-27282-move-ref-mut-into-guard.rs:11:19
|
LL | if { (|| { let mut bar = foo; bar.take() })(); false } => {},
| ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
| |
| `foo` is moved here
|
= note: variables bound in patterns cannot be moved from until after the end of the pattern guard
help: consider cloning the value if the performance cost is acceptable
|
LL | if { (|| { let mut bar = foo.clone(); bar.take() })(); false } => {},
| ++++++++
```
|
||
|---|---|---|
| .. | ||
| escape-argument-callee.rs | ||
| escape-argument-callee.stderr | ||
| escape-argument.rs | ||
| escape-argument.stderr | ||
| escape-upvar-nested.rs | ||
| escape-upvar-nested.stderr | ||
| escape-upvar-ref.rs | ||
| escape-upvar-ref.stderr | ||
| issue-58127-mutliple-requirements.rs | ||
| propagate-approximated-fail-no-postdom.rs | ||
| propagate-approximated-fail-no-postdom.stderr | ||
| propagate-approximated-ref.rs | ||
| propagate-approximated-ref.stderr | ||
| propagate-approximated-shorter-to-static-comparing-against-free.rs | ||
| propagate-approximated-shorter-to-static-comparing-against-free.stderr | ||
| propagate-approximated-shorter-to-static-no-bound.rs | ||
| propagate-approximated-shorter-to-static-no-bound.stderr | ||
| propagate-approximated-shorter-to-static-wrong-bound.rs | ||
| propagate-approximated-shorter-to-static-wrong-bound.stderr | ||
| propagate-approximated-val.rs | ||
| propagate-approximated-val.stderr | ||
| propagate-despite-same-free-region.rs | ||
| propagate-despite-same-free-region.stderr | ||
| propagate-fail-to-approximate-longer-no-bounds.rs | ||
| propagate-fail-to-approximate-longer-no-bounds.stderr | ||
| propagate-fail-to-approximate-longer-wrong-bounds.rs | ||
| propagate-fail-to-approximate-longer-wrong-bounds.stderr | ||
| propagate-from-trait-match.rs | ||
| propagate-from-trait-match.stderr | ||
| propagate-multiple-requirements.rs | ||
| propagate-multiple-requirements.stderr | ||
| region-lbr-anon-does-not-outlive-static.rs | ||
| region-lbr-anon-does-not-outlive-static.stderr | ||
| region-lbr-named-does-not-outlive-static.rs | ||
| region-lbr-named-does-not-outlive-static.stderr | ||
| region-lbr1-does-not-outlive-ebr2.rs | ||
| region-lbr1-does-not-outlive-ebr2.stderr | ||
| region-lbr1-does-outlive-lbr2-because-implied-bound.rs | ||
| return-wrong-bound-region.rs | ||
| return-wrong-bound-region.stderr | ||
| type-test-subject-non-trivial-region.rs | ||
| type-test-subject-opaque-1.rs | ||
| type-test-subject-opaque-2.rs | ||
| type-test-subject-unnamed-region.rs | ||