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
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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
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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
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LL | if { (|| { let mut bar = foo.clone(); bar.take() })(); false } => {},
| ++++++++
```
55 lines
1.9 KiB
Plaintext
55 lines
1.9 KiB
Plaintext
error[E0597]: `a` does not live long enough
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--> $DIR/method-ufcs-2.rs:30:7
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LL | let a = 22;
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| - binding `a` declared here
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...
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LL | x(&a, b, c);
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| --^^-------
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| | |
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| | borrowed value does not live long enough
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| argument requires that `a` is borrowed for `'static`
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LL | }
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| - `a` dropped here while still borrowed
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error[E0597]: `b` does not live long enough
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--> $DIR/method-ufcs-2.rs:37:39
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LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
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| -- lifetime `'a` defined here
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LL | let a = 22;
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LL | let b = 44;
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| - binding `b` declared here
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LL | let c = 66;
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LL | <_ as Bazoom<&'a u32>>::method(a, &b, c);
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| ----------------------------------^^----
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| | |
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| | borrowed value does not live long enough
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| argument requires that `b` is borrowed for `'a`
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LL | }
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| - `b` dropped here while still borrowed
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error[E0597]: `b` does not live long enough
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--> $DIR/method-ufcs-2.rs:51:44
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LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
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| -- lifetime `'a` defined here
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LL | let a = 22;
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LL | let b = 44;
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| - binding `b` declared here
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LL | let _closure = || {
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| -- value captured here
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LL | let c = 66;
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LL | <_ as Bazoom<&'a u32>>::method(a, &b, c);
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| -----------------------------------^----
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| | |
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| | borrowed value does not live long enough
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| argument requires that `b` is borrowed for `'a`
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LL | };
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LL | }
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| - `b` dropped here while still borrowed
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0597`.
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