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-rw-r--r--src/libsyntax/config.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/config.rs b/src/libsyntax/config.rs
index 7ca0591be50..dfe3477bddc 100644
--- a/src/libsyntax/config.rs
+++ b/src/libsyntax/config.rs
@@ -311,7 +311,7 @@ impl<'a> fold::Folder for CfgAttrFolder<'a> {
             }
         };
 
-        if attr::cfg_matches(self.diag, &self.config[], &cfg) {
+        if attr::cfg_matches(self.diag, &self.config[..], &cfg) {
             Some(respan(mi.span, ast::Attribute_ {
                 id: attr::mk_attr_id(),
                 style: attr.node.style,