1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 1f033b25fe4..a52d0488307 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -4699,7 +4699,7 @@ impl<'a> Parser<'a> {
                     SeqSep::trailing_allowed(token::Comma),
                     |p| p.parse_fn_block_arg()
                 );
-                self.bump();
+                self.expect(&token::BinOp(token::Or))?;
                 args
             }
         };