http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53879
--- Comment #3 from Ian Lance Taylor <ian at airs dot com> 2012-07-13 17:47:18 UTC --- The version of Go on the 4.6 branch is quite out-dated. I don't mind if somebody tries to fix it up, but I don't plan to do so myself. I strongly recommend that anybody using gccgo use GCC 4.7.1 or later.