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Fix a parser ICE on invalid fn body #87646

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merged 1 commit into from
Aug 3, 2021
Merged

Fix a parser ICE on invalid fn body #87646

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4 changes: 1 addition & 3 deletions compiler/rustc_parse/src/parser/item.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1715,13 +1715,11 @@ impl<'a> Parser<'a> {
// the AST for typechecking.
err.span_label(ident.span, "while parsing this `fn`");
err.emit();
(Vec::new(), None)
} else {
return Err(err);
}
} else {
unreachable!()
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maybe add a delay_span_bug to protect against this ever passing compilation.

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unreachable!() is equivalent to bug!(), isn't it? (Unless that's only the case for debug builds.)

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esteban and I had a short chat. This is ok, even if not idea. There should be an issue mentioning the wrong first error suggestion (as seen in the newly added test) and that we should find a way to avoid that message and just show the second one.

r=me with that issue opened.

}
(Vec::new(), None)
};
attrs.extend(inner_attrs);
Ok(body)
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9 changes: 9 additions & 0 deletions src/test/ui/parser/issue-87635.rs
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@@ -0,0 +1,9 @@
struct Foo {}

impl Foo {
pub fn bar()
//~^ ERROR: expected `;`, found `}`
//~| ERROR: associated function in `impl` without body
}

fn main() {}
19 changes: 19 additions & 0 deletions src/test/ui/parser/issue-87635.stderr
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@@ -0,0 +1,19 @@
error: expected `;`, found `}`
--> $DIR/issue-87635.rs:4:17
|
LL | pub fn bar()
| ^ help: add `;` here
...
LL | }
| - unexpected token

error: associated function in `impl` without body
--> $DIR/issue-87635.rs:4:5
|
LL | pub fn bar()
| ^^^^^^^^^^^-
| |
| help: provide a definition for the function: `{ <body> }`

error: aborting due to 2 previous errors