https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105779
--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:72e52b88582e738c8b8bde5f85af63d3a0e15d2b commit r13-919-g72e52b88582e738c8b8bde5f85af63d3a0e15d2b 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.