https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92552
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Tue Jan 7 01:07:59 2020 New Revision: 279936 URL: https://gcc.gnu.org/viewcvs?rev=279936&root=gcc&view=rev Log: PR c++/92552 - ICE with inherited constrained default ctor. We set TYPE_HAS_USER_CONSTRUCTOR on the template type in lookup_using_decl, but we didn't copy it to the instantiation. Setting it in one_inherited_ctor is too late, as that gets called after we decide whether to set CLASSTYPE_LAZY_DEFAULT_CTOR. This change affects other testcases as well; the changes are fixes for the other inherited constructor tests as well. * pt.c (instantiate_class_template_1): Copy TYPE_HAS_USER_CONSTRUCTOR. * class.c (one_inherited_ctor): Don't set it here. Added: trunk/gcc/testsuite/g++.dg/cpp2a/concepts-inherit-ctor7.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/class.c trunk/gcc/cp/pt.c trunk/gcc/testsuite/g++.dg/concepts/inherit-ctor3.C trunk/gcc/testsuite/g++.dg/cpp2a/concepts-inherit-ctor2.C trunk/gcc/testsuite/g++.dg/template/crash7.C trunk/gcc/testsuite/g++.old-deja/g++.pt/error2.C
