From b676e99b605274c48bea04d344ff18c546041a8f Mon Sep 17 00:00:00 2001
From: Lee Jeffery <lee@leejeffery.co.uk>
Date: Mon, 29 Jun 2015 20:40:18 +0100
Subject: [PATCH] Fix incorrect warning about unused repr attributes.

---
 src/librustc_lint/builtin.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/librustc_lint/builtin.rs b/src/librustc_lint/builtin.rs
index db48608823d2..16db45c909d8 100644
--- a/src/librustc_lint/builtin.rs
+++ b/src/librustc_lint/builtin.rs
@@ -821,10 +821,12 @@ fn get_lints(&self) -> LintArray {
     }
 
     fn check_item(&mut self, cx: &Context, it: &ast::Item) {
-        let has_extern_repr = it.attrs.iter().any(|attr| {
+        let extern_repr_count = it.attrs.iter().filter(|attr| {
             attr::find_repr_attrs(cx.tcx.sess.diagnostic(), attr).iter()
                 .any(|r| r == &attr::ReprExtern)
-        });
+        }).count();
+        let has_extern_repr = extern_repr_count > 0;
+
         if has_extern_repr {
             return;
         }