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 } => {},
| ++++++++
```
|
||
|---|---|---|
| .. | ||
| bad-main.rs | ||
| bad-main.stderr | ||
| dyn-fn-alignment.rs | ||
| expr-fn-panic.rs | ||
| expr-fn.rs | ||
| fn-bad-block-type.rs | ||
| fn-bad-block-type.stderr | ||
| fn-closure-mutable-capture.rs | ||
| fn-closure-mutable-capture.stderr | ||
| fn-compare-mismatch.rs | ||
| fn-compare-mismatch.stderr | ||
| fn-item-type.rs | ||
| fn-item-type.stderr | ||
| fn-pointer-mismatch.rs | ||
| fn-pointer-mismatch.stderr | ||
| fn-ptr-trait-int-float-infer-var.rs | ||
| fn-ptr-trait.rs | ||
| fn-recover-return-sign.fixed | ||
| fn-recover-return-sign.rs | ||
| fn-recover-return-sign.stderr | ||
| fn-recover-return-sign2.rs | ||
| fn-recover-return-sign2.stderr | ||
| fn-trait-formatting.rs | ||
| fn-trait-formatting.stderr | ||
| fn_def_coercion.rs | ||
| fn_def_coercion.stderr | ||
| fn_def_opaque_coercion.rs | ||
| fun-call-variants.rs | ||
| implied-bounds-impl-header-projections.rs | ||
| implied-bounds-unnorm-associated-type-2.rs | ||
| implied-bounds-unnorm-associated-type-2.stderr | ||
| implied-bounds-unnorm-associated-type-3.rs | ||
| implied-bounds-unnorm-associated-type-4.rs | ||
| implied-bounds-unnorm-associated-type-4.stderr | ||
| implied-bounds-unnorm-associated-type-5.rs | ||
| implied-bounds-unnorm-associated-type-5.stderr | ||
| implied-bounds-unnorm-associated-type.rs | ||
| implied-bounds-unnorm-associated-type.stderr | ||
| issue-1451.rs | ||
| issue-1900.rs | ||
| issue-1900.stderr | ||
| issue-3044.rs | ||
| issue-3044.stderr | ||
| issue-3099.rs | ||
| issue-3099.stderr | ||
| issue-3904.rs | ||
| issue-39259.rs | ||
| issue-39259.stderr | ||
| issue-80179.rs | ||
| issue-80179.stderr | ||
| keyword-order.rs | ||
| keyword-order.stderr | ||
| nested-function-names-issue-8587.rs | ||
| signature-error-reporting-under-verbose.rs | ||
| signature-error-reporting-under-verbose.stderr | ||
| suggest-return-closure.rs | ||
| suggest-return-closure.stderr | ||
| suggest-return-future.rs | ||
| suggest-return-future.stderr | ||