rust/compiler/rustc_trait_selection/src
Esteban Küber d3a148fe07 When encountering unexpected closure return type, point at return type/expression
```
error[E0271]: expected `{closure@fallback-closure-wrap.rs:18:40}` to be a closure that returns `()`, but it returns `!`
  --> $DIR/fallback-closure-wrap.rs:19:9
   |
LL |     let error = Closure::wrap(Box::new(move || {
   |                                        -------
LL |         panic!("Can't connect to server.");
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found `!`
   |
   = note: expected unit type `()`
                   found type `!`
   = note: required for the cast from `Box<{closure@$DIR/fallback-closure-wrap.rs:18:40: 18:47}>` to `Box<dyn FnMut()>`
```

```
error[E0271]: expected `{closure@dont-ice-for-type-mismatch-in-closure-in-async.rs:6:10}` to be a closure that returns `bool`, but it returns `Option<()>`
  --> $DIR/dont-ice-for-type-mismatch-in-closure-in-async.rs:6:16
   |
LL |     call(|| -> Option<()> {
   |     ---- ------^^^^^^^^^^
   |     |          |
   |     |          expected `bool`, found `Option<()>`
   |     required by a bound introduced by this call
   |
   = note: expected type `bool`
              found enum `Option<()>`
note: required by a bound in `call`
  --> $DIR/dont-ice-for-type-mismatch-in-closure-in-async.rs:3:25
   |
LL | fn call(_: impl Fn() -> bool) {}
   |                         ^^^^ required by this bound in `call`
```

```
error[E0271]: expected `{closure@f670.rs:28:13}` to be a closure that returns `Result<(), _>`, but it returns `!`
    --> f670.rs:28:20
     |
28   |     let c = |e| -> ! {
     |             -------^
     |                    |
     |                    expected `Result<(), _>`, found `!`
...
32   |     f().or_else(c);
     |         ------- required by a bound introduced by this call
-Ztrack-diagnostics: created at compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs:1433:28
     |
     = note: expected enum `Result<(), _>`
                found type `!`
note: required by a bound in `Result::<T, E>::or_else`
    --> /home/gh-estebank/rust/library/core/src/result.rs:1406:39
     |
1406 |     pub fn or_else<F, O: FnOnce(E) -> Result<T, F>>(self, op: O) -> Result<T, F> {
     |                                       ^^^^^^^^^^^^ required by this bound in `Result::<T, E>::or_else`
```
2025-01-30 18:38:37 +00:00
..
error_reporting When encountering unexpected closure return type, point at return type/expression 2025-01-30 18:38:37 +00:00
errors introduce LateParamRegionKind 2024-12-18 16:05:44 +01:00
solve Don't pick T: FnPtr nested goals 2025-01-22 06:55:38 +00:00
traits Auto merge of #136038 - compiler-errors:outlives, r=lcnr 2025-01-30 11:40:32 +00:00
errors.rs Rollup merge of #133382 - mu001999-contrib:diag/fnitem, r=lcnr 2025-01-29 15:29:27 +01:00
infer.rs Suggest Semicolon in Incorrect Repeat Expressions 2024-12-21 02:30:50 +00:00
lib.rs consistently handle global where-bounds 2024-12-17 08:50:47 +01:00
regions.rs Move param env bound deep normalization to OutlivesEnvironment building 2025-01-28 19:11:05 +00:00
solve.rs impossible obligations check fast path 2024-10-10 06:09:50 -04:00