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Rollup merge of #111708 - jyn514:delay-span-bug-msg, r=compiler-errors

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Give a more useful location for where a span_bug was delayed

Before:
```
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
                        at ./compiler/rustc_errors/src/lib.rs:1335:29
              1: <rustc_errors::Handler>::emit_diagnostic
                        at ./compiler/rustc_errors/src/lib.rs:1124:9
...
```

After:
```
   = note: delayed at compiler/rustc_parse/src/parser/diagnostics.rs:2158:28
              0: <rustc_errors::HandlerInner>::emit_diagnostic
                        at ./compiler/rustc_errors/src/lib.rs:1335:29
              1: <rustc_errors::Handler>::emit_diagnostic
                        at ./compiler/rustc_errors/src/lib.rs:1124:9
...
```

This both makes the relevant frame easier to find without having to dig through diagnostic internals, and avoids the weird-looking formatting for the first frame.

Found while working on https://github.com/rust-lang/rust/issues/111529.
This commit is contained in:
Dylan DPC 2023-05-20 12:21:00 +05:30 committed by GitHub
parent e892e32df4 e6a7fdedd7
commit 35bef062c7
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2 changed files with 2 additions and 1 deletions
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2
compiler/rustc_errors/src/lib.rs
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@ -1740,7 +1740,7 @@ fn with_backtrace(diagnostic: Diagnostic, backtrace: Backtrace) -> Self {
}
fn decorate(mut self) -> Diagnostic {
self.inner.note(format!("delayed at {}", self.note));
self.inner.note(format!("delayed at {}\n{}", self.inner.emitted_at, self.note));
self.inner
}
}

1
compiler/rustc_parse/src/parser/diagnostics.rs
View file

@ -238,6 +238,7 @@ fn deref_mut(&mut self) -> &mut Self::Target {
impl<'a> Parser<'a> {
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_span_err<S: Into<MultiSpan>>(
&self,
sp: S,