http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53026
kennytm at gmail dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kennytm at gmail dot com --- Comment #4 from kennytm at gmail dot com 2012-06-23 18:40:55 UTC --- A smaller test case which should be the same bug. ---------------------- struct M {}; template <typename> using K = const M; K<int> a; ---------------------- Both the segfault appear in the lookup_template_class() function.