[Bug c++/52942] [4.7 Regression] using std::ref with a std::unordered_map fails to compile

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52942

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-04-12 01:38:50 UTC ---
Bah, the more I look into it, the more seems indeed a front-end issue, I see
only public typedefs around. Then we would badly need a small reproducer.