https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91930
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Mon Oct 14 20:13:49 2019 New Revision: 276968 URL: https://gcc.gnu.org/viewcvs?rev=276968&root=gcc&view=rev Log: PR c++/91930 - ICE with constrained inherited default ctor. The testcase was crashing because lazily_declare_fn was failing to add a defaulted constructor, because the implicit declaration was less constrained than the inherited default constructor. But when we have an inherited constructor, we shouldn't be trying to declare a default constructor in the first place, because it counts as "a user-declared constructor". With that fixed I needed to adjust a couple of inherited constructor testcases that previously had been diagnosing the default constructor as deleted rather than not declared. * name-lookup.c (do_class_using_decl): Set TYPE_HAS_USER_CONSTRUCTOR for inherited constructor. Added: trunk/gcc/testsuite/g++.dg/cpp2a/concepts-inherit-ctor6.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/name-lookup.c trunk/gcc/testsuite/g++.dg/cpp0x/inh-ctor5.C trunk/gcc/testsuite/g++.dg/cpp1z/inh-ctor22.C
