https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96199
--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:a588c87ba309492b351c1a55b08d907b65913e2c commit r10-9415-ga588c87ba309492b351c1a55b08d907b65913e2c Author: Jason Merrill <ja...@redhat.com> Date: Wed Mar 3 17:38:55 2021 -0500 c++: Normalization and deduction guide rewriting [PR96199] This is a subset of r11-2748; we don't want to rewrite all deduction guides in GCC 10, but we do need the push_nested_class in normalization to avoid breaking cmcstl2. gcc/cp/ChangeLog: PR c++/96199 * cp-tree.h (struct push_nested_class_guard): New. * constraint.cc (get_normalized_constraints_from_decl): Use it.