https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99445
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:a2531859bf5bf6cf1f29c0dca85fd26e80904a5d commit r11-7931-ga2531859bf5bf6cf1f29c0dca85fd26e80904a5d Author: Jason Merrill <ja...@redhat.com> Date: Tue Mar 30 20:31:18 2021 -0400 c++: Alias template in pack expansion [PR99445] In this testcase, iterative_hash_template_arg checks alias_template_specialization_p to determine whether to treat a type as a dependent alias, and structural_comptypes checks dependent_alias_template_spec_p. Normally that difference isn't a problem because canonicalizing template arguments strips non-dependent aliases, but that wasn't happening for the pack expansion. Fixed thus. gcc/cp/ChangeLog: PR c++/99445 * tree.c (strip_typedefs): Handle TYPE_PACK_EXPANSION. gcc/testsuite/ChangeLog: PR c++/99445 * g++.dg/cpp0x/alias-decl-variadic1.C: New test.
