bjoernager/rust
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stash_diagnostic: ICE in a different way

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This commit is contained in:
Mazdak Farrokhzad 2019-09-23 19:29:02 +02:00
parent 62d85849d0
commit 62fc4d36df
1 changed files with 18 additions and 9 deletions
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27
src/librustc_errors/lib.rs
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@ -466,10 +466,15 @@ impl Handler {
/// Stash a given diagnostic with the given `Span` and `StashKey` as the key for later stealing.
/// If the diagnostic with this `(span, key)` already exists, this will result in an ICE.
pub fn stash_diagnostic(&self, span: Span, key: StashKey, diag: Diagnostic) {
if let Some(old) = self.inner.borrow_mut().stashed_diagnostics.insert((span, key), diag) {
let mut inner = self.inner.borrow_mut();
if let Some(mut old_diag) = inner.stashed_diagnostics.insert((span, key), diag) {
// We are removing a previously stashed diagnostic which should not happen.
// Create a builder and drop it on the floor to get an ICE.
drop(DiagnosticBuilder::new_diagnostic(self, old));
old_diag.level = Bug;
old_diag.note(&format!(
"{}:{}: already existing stashed diagnostic with (span = {:?}, key = {:?})",
file!(), line!(), span, key
));
inner.emit_explicit_bug(&old_diag);
}
}
@ -676,6 +681,11 @@ impl Handler {
self.inner.borrow_mut().abort_if_errors_and_should_abort()
}
/// `true` if we haven't taught a diagnostic with this code already.
/// The caller must then teach the user about such a diagnostic.
///
/// Used to suppress emitting the same error multiple times with extended explanation when
/// calling `-Zteach`.
pub fn must_teach(&self, code: &DiagnosticId) -> bool {
self.inner.borrow_mut().must_teach(code)
}
@ -698,11 +708,6 @@ impl Handler {
}
impl HandlerInner {
/// `true` if we haven't taught a diagnostic with this code already.
/// The caller must then teach the user about such a diagnostic.
///
/// Used to suppress emitting the same error multiple times with extended explanation when
/// calling `-Zteach`.
fn must_teach(&mut self, code: &DiagnosticId) -> bool {
self.taught_diagnostics.insert(code.clone())
}
@ -833,7 +838,11 @@ impl HandlerInner {
}
fn span_bug<S: Into<MultiSpan>>(&mut self, sp: S, msg: &str) -> ! {
self.emit_diagnostic(Diagnostic::new(Bug, msg).set_span(sp));
self.emit_explicit_bug(Diagnostic::new(Bug, msg).set_span(sp));
}
fn emit_explicit_bug(&mut self, diag: &Diagnostic) -> ! {
self.emit_diagnostic(diag);
self.abort_if_errors_and_should_abort();
panic!(ExplicitBug);
}