https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109649
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:7ce078ceca42f184f6f60c3ca921b6e07cf2c4bd commit r14-460-g7ce078ceca42f184f6f60c3ca921b6e07cf2c4bd Author: Jason Merrill <ja...@redhat.com> Date: Wed May 3 13:32:55 2023 -0400 c++: over-eager friend matching [PR109649] A bug in the simplification I did around 91618; at this point X<int>::f has DECL_IMPLICIT_INSTANTIATION set, but we've already identified what template it corresponds to, so we don't want to call check_explicit_specialization. To distinguish this case we need to look at DECL_TI_TEMPLATE. grokfndecl has for a long time set it to the OVERLOAD in this case, while the new cases I added for 91618 were leaving DECL_TEMPLATE_INFO null; let's adjust them to match. PR c++/91618 PR c++/109649 gcc/cp/ChangeLog: * friend.cc (do_friend): Don't call check_explicit_specialization if DECL_TEMPLATE_INFO is already set. * decl2.cc (check_classfn): Set DECL_TEMPLATE_INFO. * name-lookup.cc (set_decl_namespace): Likewise. gcc/testsuite/ChangeLog: * g++.dg/template/friend77.C: New test.
