https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81917
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Fri Feb 9 21:01:49 2018 New Revision: 257542 URL: https://gcc.gnu.org/viewcvs?rev=257542&root=gcc&view=rev Log: PR c++/81917 - ICE with void_t and partial specialization. * pt.c (instantiate_class_template_1): Set TYPE_BEING_DEFINED before calling most_specialized_partial_spec. Added: trunk/gcc/testsuite/g++.dg/cpp0x/alias-decl-62.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/pt.c trunk/gcc/testsuite/g++.dg/cpp0x/initlist-template2.C trunk/gcc/testsuite/g++.dg/template/crash125.C trunk/gcc/testsuite/g++.dg/template/pr51488.C trunk/gcc/testsuite/g++.dg/template/pr55843.C