[Bug c++/53067] c++0x GCC 4.7.0 Regression std::ref with unordered sets

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53067

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-04-22 16:10:38 UTC ---
I'm right now rebuilding both mainline and branch, because yesterday both
worked and I don't think we changed anything in this area. What the heck it is?