http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53005
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-04-16 11:18:51 UTC --- Lili Zhao, I forgot to say, but feel free to reopen this if you can reproduce the bug with GCC 4.7. Thanks for the report anyway, and sorry we cannot help you.