From a5e1f8246c9f989dbbb766117ca79be7390b68fe Mon Sep 17 00:00:00 2001
From: Sergio Benitez <sb@sergio.bz>
Date: Thu, 25 Aug 2016 19:02:26 -0700
Subject: [PATCH] Revert parsing bug introduced in commit
 43bfefc1b23b341f91e3039e83074049ad90c359.

---
 macros/src/meta_item_parser.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/macros/src/meta_item_parser.rs b/macros/src/meta_item_parser.rs
index 38774bec..56afa68b 100644
--- a/macros/src/meta_item_parser.rs
+++ b/macros/src/meta_item_parser.rs
@@ -107,7 +107,7 @@ impl<'s, 'a, 'c> Iterator for ParamIter<'s, 'a, 'c> {
         if param.len() == 0 {
             self.ctxt.span_err(param_span, "Parameter names cannot be empty.");
             None
-        } else if param.contains(char::is_alphanumeric) {
+        } else if param.contains(|c: char| !c.is_alphanumeric()) {
             self.ctxt.span_err(param_span, "Parameters must be alphanumeric.");
             None
         } else {