1 files changed, 4 insertions, 8 deletions
diff --git a/src/librustc_parse/parser/attr.rs b/src/librustc_parse/parser/attr.rs
index b2ae934ce64..b2030a4570e 100644
--- a/src/librustc_parse/parser/attr.rs
+++ b/src/librustc_parse/parser/attr.rs
@@ -238,22 +238,18 @@ impl<'a> Parser<'a> {
 
     /// Parses `cfg_attr(pred, attr_item_list)` where `attr_item_list` is comma-delimited.
     pub fn parse_cfg_attr(&mut self) -> PResult<'a, (ast::MetaItem, Vec<(ast::AttrItem, Span)>)> {
-        self.expect(&token::OpenDelim(token::Paren))?;
-
         let cfg_predicate = self.parse_meta_item()?;
         self.expect(&token::Comma)?;
 
         // Presumably, the majority of the time there will only be one attr.
         let mut expanded_attrs = Vec::with_capacity(1);
-
-        while !self.check(&token::CloseDelim(token::Paren)) {
-            let lo = self.token.span.lo();
+        while self.token.kind != token::Eof {
+            let lo = self.token.span;
             let item = self.parse_attr_item()?;
-            expanded_attrs.push((item, self.prev_span.with_lo(lo)));
-            self.expect_one_of(&[token::Comma], &[token::CloseDelim(token::Paren)])?;
+            expanded_attrs.push((item, lo.to(self.prev_span)));
+            self.eat(&token::Comma);
         }
 
-        self.expect(&token::CloseDelim(token::Paren))?;
         Ok((cfg_predicate, expanded_attrs))
     }