https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105779
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:819e3fda1e0fc4cc07f5fd9211cdb38cdec1b901 commit r12-8446-g819e3fda1e0fc4cc07f5fd9211cdb38cdec1b901 Author: Jason Merrill <ja...@redhat.com> Date: Tue May 31 16:17:58 2022 -0400 c++: auto function as function argument [PR105779] This testcase demonstrates that the issue in PR105623 is not limited to templates, so we should do the marking in a less template-specific place. PR c++/105779 gcc/cp/ChangeLog: * call.cc (resolve_args): Call mark_single_function here. * pt.cc (unify_one_argument): Not here. gcc/testsuite/ChangeLog: * g++.dg/cpp1y/auto-fn63.C: New test.