Modify `find_expr` from `Span` to better account for closures

2024-04-24T22:21:13+00:00

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 } => {}, | ++++++++ ```

Show number in error message even for one error

2023-11-24T18:15:52+00:00

Co-authored-by: Adrian

Move /src/test to /tests

2023-01-11T09:32:08+00:00

rust/tests/ui/regions/regions-nested-fns-2.stderr, branch try-perf

Modify `find_expr` from `Span` to better account for closures

Show number in error message even for one error

Move /src/test to /tests