https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91607
--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:e19f06538c51fed54240a4e98277e62daa00d9b3 commit r9-8339-ge19f06538c51fed54240a4e98277e62daa00d9b3 Author: Jason Merrill <ja...@redhat.com> Date: Wed Mar 4 23:07:13 2020 -0500 c++: Fix constexpr ICE from const mismatch [PR91607] gcc/cp/ChangeLog 2020-03-04 Jason Merrill <ja...@redhat.com> PR c++/91607 * constexpr.c (constexpr_call_hasher::equal): Use same_type_ignoring_top_level_qualifiers_p.