https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92852
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-8 branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:90e1d25b60630d45fe1092abeb8f4d7b6c5e2da2 commit r8-10051-g90e1d25b60630d45fe1092abeb8f4d7b6c5e2da2 Author: Jason Merrill <ja...@redhat.com> Date: Mon Feb 24 11:21:47 2020 -0500 c++: Preserve location in maybe_constant_value. If cxx_eval_outermost_constant_expr doesn't change the argument, we really shouldn't unshare it when we try to fold it again. gcc/cp/ChangeLog 2020-02-24 Jason Merrill <ja...@redhat.com> PR c++/92852 * constexpr.c (maybe_constant_value): Don't unshare if the cached value is the same as the argument.