https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121351
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Patrick Palka <ppa...@gcc.gnu.org>: https://gcc.gnu.org/g:b9da8541c4acfc0a65f574bace6ca160bf70cc01 commit r16-2772-gb9da8541c4acfc0a65f574bace6ca160bf70cc01 Author: Patrick Palka <ppa...@redhat.com> Date: Mon Aug 4 17:09:28 2025 -0400 c++: add another testcase [PR121351] Here's a previously accepted testcase that is now ambiguous after r16-2771-gb9f1cc4e119da, since the uninstantiated constraints are equivalent but the partially instantiated constraints aren't, so the two member functions no longer correspond. PR c++/121351 gcc/testsuite/ChangeLog: * g++.dg/cpp2a/concepts-using6.C: New test.
