https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95451
--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-8 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:a42f679e87e5982788981439d9d1ff2fdd7323e9 commit r8-10892-ga42f679e87e5982788981439d9d1ff2fdd7323e9 Author: Jakub Jelinek <ja...@redhat.com> Date: Fri Feb 26 10:43:28 2021 +0100 c++: Fix operator() lookup in lambdas [PR95451] During name lookup, name-lookup.c uses: if (!(!iter->type && HIDDEN_TYPE_BINDING_P (iter)) && (bool (want & LOOK_want::HIDDEN_LAMBDA) || !is_lambda_ignored_entity (iter->value)) && qualify_lookup (iter->value, want)) binding = iter->value; Unfortunately as the following testcase shows, this doesn't work in generic lambdas, where we on the auto b = ... lambda ICE and on the auto d = lambda reject it even when it should be valid. The problem is that the binding doesn't have a FUNCTION_DECL with LAMBDA_FUNCTION_P for the operator(), but an OVERLOAD with TEMPLATE_DECL for such FUNCTION_DECL. The following patch fixes that in is_lambda_ignored_entity, other possibility would be to do that before calling is_lambda_ignored_entity in name-lookup.c. 2021-02-26 Jakub Jelinek <ja...@redhat.com> PR c++/95451 * lambda.c (is_lambda_ignored_entity): Before checking for LAMBDA_FUNCTION_P, use OVL_FIRST. Drop FUNCTION_DECL check. * g++.dg/cpp1y/lambda-generic-95451.C: New test. (cherry picked from commit 8f9308936cf1df134d5aac1f890eb67266530ab5)
