https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110535
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-13 branch has been updated by Patrick Palka <ppa...@gcc.gnu.org>: https://gcc.gnu.org/g:92f6240baf80f998ca6c1408c3ee09d5d2ae68d7 commit r13-7592-g92f6240baf80f998ca6c1408c3ee09d5d2ae68d7 Author: Patrick Palka <ppa...@redhat.com> Date: Tue Jul 18 09:21:40 2023 -0400 c++: constrained surrogate call functions [PR110535] We weren't checking constraints on pointer/reference-to-function conversion functions during overload resolution, which caused us to ICE on the first testcase and reject the second testcase. PR c++/110535 gcc/cp/ChangeLog: * call.cc (add_conv_candidate): Check constraints. gcc/testsuite/ChangeLog: * g++.dg/cpp2a/concepts-surrogate1.C: New test. * g++.dg/cpp2a/concepts-surrogate2.C: New test. (cherry picked from commit 1e0f37df1b12cd91a6dbb523f5c722f9a961edaa)