Fix symbol mangling in the presence of trailing version numbers.

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;
 }