From 1c1af99052b3a2fb32ed0ce4b5f68b7671e6e45e Mon Sep 17 00:00:00 2001
From: Graydon Hoare <graydon@mozilla.com>
Date: Tue, 1 May 2012 17:21:06 -0700
Subject: [PATCH] Fix symbol mangling in the presence of trailing version
 numbers.

---
 src/rustc/back/link.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/rustc/back/link.rs b/src/rustc/back/link.rs
index 8bf6c585557..8486af2d09e 100644
--- a/src/rustc/back/link.rs
+++ b/src/rustc/back/link.rs
@@ -466,6 +466,14 @@ fn sanitize(s: str) -> str {
           }
         }
     }
+
+    // Underscore-qualify anything that didn't start as an ident.
+    if result.len() > 0u &&
+        result[0] != '_' as u8 &&
+        ! char::is_XID_start(result[0] as char) {
+        ret "_" + result;
+    }
+
     ret result;
 }