rust/tests/ui/crashes/unreachable-array-or-slice.stderr
Nicholas Nethercote 81783fbf89 Overhaul how stashed diagnostics work, again.
Stashed errors used to be counted as errors, but could then be
cancelled, leading to `ErrorGuaranteed` soundness holes.  changed
that, closing the soundness hole. But it introduced other difficulties
because you sometimes have to account for pending stashed errors when
making decisions about whether errors have occured/will occur and it's
easy to overlook these.

This commit aims for a middle ground.
- Stashed errors (not warnings) are counted immediately as emitted
  errors, avoiding the possibility of forgetting to consider them.
- The ability to cancel (or downgrade) stashed errors is eliminated, by
  disallowing the use of `steal_diagnostic` with errors, and introducing
  the more restrictive methods `try_steal_{modify,replace}_and_emit_err`
  that can be used instead.

Other things:
- `DiagnosticBuilder::stash` and `DiagCtxt::stash_diagnostic` now both
  return `Option<ErrorGuaranteed>`, which enables the removal of two
  `delayed_bug` calls and one `Ty::new_error_with_message` call. This is
  possible because we store error guarantees in
  `DiagCtxt::stashed_diagnostics`.
- Storing the guarantees also saves us having to maintain a counter.
- Calls to the `stashed_err_count` method are no longer necessary
  alongside calls to `has_errors`, which is a nice simplification, and
  eliminates two more `span_delayed_bug` calls and one FIXME comment.
- Tests are added for three of the four fixed PRs mentioned below.
- `issue-121108.rs`'s output improved slightly, omitting a non-useful
  error message.

Fixes .
Fixes .
Fixes .
Fixes .
2024-02-29 11:08:27 +11:00

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error[E0433]: failed to resolve: `Self` is only available in impls, traits, and type definitions
--> tests/ui/crashes/unreachable-array-or-slice.rs:4:9
|
LL | let Self::anything_here_kills_it(a, b, ..) = Foo(5, 5, 5, 5);
| ^^^^ `Self` is only available in impls, traits, and type definitions
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0433`.