Improve error message for `AsyncFn` trait failure for RPIT Use a `WellFormedDerived` obligation cause to make sure we can turn an `AsyncFnKindHelper` trait goal into its parent `AsyncFn*` goal, then fix the logic for reporting `AsyncFn*` kind mismatches. Best reviewed without whitespace. Fixes #137905 r? oli-obk |
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| .. | ||
| error_reporting | ||
| errors | ||
| solve | ||
| traits | ||
| errors.rs | ||
| infer.rs | ||
| lib.rs | ||
| regions.rs | ||
| solve.rs | ||