http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53115
--- Comment #3 from Timothy Tenebekov <tat_13 at mail dot ru> 2012-04-25 14:55:33 UTC --- I got this revision of bits/hashtable.h while upgrading gcc to version 4.7.0 on Debian using http://packages.dotdeb.org repository.