https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79653
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Author: mpolacek Date: Wed Feb 22 19:31:49 2017 New Revision: 245657 URL: https://gcc.gnu.org/viewcvs?rev=245657&root=gcc&view=rev Log: PR c++/79653 * parser.c (cp_parser_std_attribute_spec): Don't build the attribute if the alignas expression is erroneous. * pt.c (tsubst_attribute): If tsubst_pack_expansion fails, return error_mark_node. * g++.dg/cpp0x/alignas10.C: New test. * g++.dg/cpp0x/alignas9.C: New test. Added: trunk/gcc/testsuite/g++.dg/cpp0x/alignas10.C trunk/gcc/testsuite/g++.dg/cpp0x/alignas9.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/parser.c trunk/gcc/cp/pt.c trunk/gcc/testsuite/ChangeLog