https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99844
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>: https://gcc.gnu.org/g:2cd5333d16419f596d07a830bb3f1c40fa8a7b5c commit r11-8041-g2cd5333d16419f596d07a830bb3f1c40fa8a7b5c Author: Marek Polacek <pola...@redhat.com> Date: Wed Apr 7 16:44:24 2021 -0400 c++: Fix ICE with unexpanded parameter pack [PR99844] In explicit17.C, we weren't detecting an unexpanded parameter pack in explicit(bool), so we crashed on a TEMPLATE_PARM_INDEX in constexpr. I noticed the same is true for noexcept(), but only since my patch to implement delayed parsing of noexcept. Previously, we would detect the unexpanded pack in push_template_decl but now the noexcept expression has not yet been parsed, so we need to do it a bit later. gcc/cp/ChangeLog: PR c++/99844 * decl.c (build_explicit_specifier): Call check_for_bare_parameter_packs. * except.c (build_noexcept_spec): Likewise. gcc/testsuite/ChangeLog: PR c++/99844 * g++.dg/cpp2a/explicit16.C: Use c++20. * g++.dg/cpp0x/noexcept66.C: New test. * g++.dg/cpp2a/explicit17.C: New test.
