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-rw-r--r--src/libsyntax/parse/parser.rs3
1 files changed, 1 insertions, 2 deletions
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 8666c84bbef..114a8bf9d3d 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -1074,10 +1074,9 @@ impl Parser {
     // This version of parse arg doesn't necessarily require
     // identifier names.
     pub fn parse_arg_general(&self, require_name: bool) -> arg {
-        let mut is_mutbl = false;
+        let mut is_mutbl = self.eat_keyword(keywords::Mut);
         let pat = if require_name || self.is_named_argument() {
             self.parse_arg_mode();
-            is_mutbl = self.eat_keyword(keywords::Mut);
             let pat = self.parse_pat();
 
             if is_mutbl && !ast_util::pat_is_ident(pat) {