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Fix getting diagnostics example #2067

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Fix getting diagnostics example #2067

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7 changes: 5 additions & 2 deletions examples/rustc-driver-getting-diagnostics.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -77,10 +77,10 @@ fn main() {
locale_resources: rustc_driver::DEFAULT_LOCALE_RESOURCES,
lint_caps: rustc_hash::FxHashMap::default(),
psess_created: Some(Box::new(|parse_sess| {
parse_sess.dcx = DiagCtxt::new(Box::new(DebugEmitter {
parse_sess.set_dcx(DiagCtxt::new(Box::new(DebugEmitter {
source_map: parse_sess.clone_source_map(),
diagnostics,
}))
})));
})),
register_lints: None,
override_queries: None,
Expand All @@ -98,6 +98,9 @@ fn main() {
let _ = tcx.analysis(());
});
});
// If the compiler has encountered errors when this closure returns, it will abort (!) the program.
// We avoid this by resetting the error count before returning
compiler.sess.dcx().reset_err_count();
});
// Read buffered diagnostics.
buffer.lock().unwrap().iter().for_each(|diagnostic| {
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2 changes: 1 addition & 1 deletion src/rustc-driver-getting-diagnostics.md
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Expand Up @@ -8,7 +8,7 @@ otherwise be printed to stderr.
To get diagnostics from the compiler,
configure [`rustc_interface::Config`] to output diagnostic to a buffer,
and run [`TyCtxt.analysis`]. The following was tested
with <!-- date-check: may 2024 --> `nightly-2024-05-09`:
with <!-- date-check: september 2024 --> `nightly-2024-09-16`:

```rust
{{#include ../examples/rustc-driver-getting-diagnostics.rs}}
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