Don't drop PResult without handling the error

2021-05-30 00:07:34 +02:00
parent 8d1e3d3b74
commit b237f90ab9
3 changed files with 38 additions and 1 deletions
--- a/compiler/rustc_parse/src/parser/item.rs
+++ b/compiler/rustc_parse/src/parser/item.rs
@@ -1474,7 +1474,10 @@ impl<'a> Parser<'a> {
                self.sess.gated_spans.gate(sym::unnamed_fields, lo);
            } else {
                let err = if self.check_fn_front_matter(false) {
-                    let _ = self.parse_fn(&mut Vec::new(), |_| true, lo);
+                    // We use `parse_fn` to get a span for the function
+                    if let Err(mut db) = self.parse_fn(&mut Vec::new(), |_| true, lo) {
+                        db.delay_as_bug();
+                    }
                    let mut err = self.struct_span_err(
                        lo.to(self.prev_token.span),
                        &format!("functions are not allowed in {} definitions", adt_ty),