http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55340
--- Comment #3 from Johnny Willemsen <jwillemsen at remedy dot nl> 2013-02-27 19:20:24 UTC --- Thanks for checking this, will also try 4.8.0 at some point. We have hundreds of tests using C++11 extensively and this was the only one exposing this warning. This is mostly generated code and I tried to reduce it further, but when I reduced it further the warning was gone. I didn't had a clue why it could be triggered, that lack of knowledge prevented me from reducing the test case further
