(hopefully) fix pprust error

diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index bdb4ce34b91e5a93f4b9069d9256c098d50c9498..83c289ff80b9251bd2df854ebed1207b7f5a09f0 100644 (file)
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -961,9 +961,11 @@ pub fn commasep_cmnt<T, F, G>(&mut self,
     {
         self.rbox(0, b)?;
         let len = elts.len();
-        for (i, elt) in elts.iter().enumerate() {
+        let mut i = 0;
+        for elt in elts {
             self.maybe_print_comment(get_span(elt).hi)?;
             op(self, elt)?;
+            i += 1;
             if i < len {
                 word(&mut self.s, ",")?;
                 self.maybe_print_trailing_comment(get_span(elt),