https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81917
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- I couldn't reduce it further because creduce is crashing for me. Started with commit 996ae1f4f1d512b4ccad62c7d52eb2f14b3e814c Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4> Date: Sat Nov 8 06:06:42 2014 +0000 DR 1558 * pt.c (dependent_alias_template_spec_p): New. (dependent_type_p_r): Handle dependent alias template specialization. (template_args_equal): A dependent alias template specializations is not equal to its underlying type as a template argument. * tree.c (strip_typedefs): Don't strip a dependent alias template-id. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@217250 138bc75d-0d04-0410-961f-82ee72b054a4