https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108794
Bug ID: 108794 Summary: ICE in determine_visibility, at cp/decl2.cc:2839 Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: gs...@t-online.de Target Milestone: --- Affects versions down to at least r5 : $ cat z1.cc template <typename T> T g (T x) { struct B b; struct B { struct A a; }; } void f (int *x) { g (x[1]); } $ gcc-13-20230212 -c z1.cc z1.cc: In instantiation of 'struct g<int>(int)::B': z1.cc:3:12: required from 'T g(T) [with T = int]' z1.cc:8:5: required from here z1.cc:4:23: internal compiler error: Segmentation fault 4 | struct B { struct A a; }; | ^ 0xeb71af crash_signal ../../gcc/toplev.cc:314 0x84432d determine_visibility(tree_node*) ../../gcc/cp/decl2.cc:2839 0x8bf921 pushtag(tree_node*, tree_node*, TAG_how) ../../gcc/cp/name-lookup.cc:8007 0x93a8a8 lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*, int, int) ../../gcc/cp/pt.cc:10090 0x93af76 tsubst_aggr_type_1 ../../gcc/cp/pt.cc:13940 0x930b8d tsubst(tree_node*, tree_node*, int, tree_node*) ../../gcc/cp/pt.cc:15915 0x938336 tsubst_decl ../../gcc/cp/pt.cc:14949 0x931317 tsubst(tree_node*, tree_node*, int, tree_node*) ../../gcc/cp/pt.cc:15825 0x944cf5 instantiate_class_template(tree_node*) ../../gcc/cp/pt.cc:12278 0x97cd53 complete_type(tree_node*) ../../gcc/cp/typeck.cc:138 0x9387e5 tsubst_decl ../../gcc/cp/pt.cc:15237 0x931317 tsubst(tree_node*, tree_node*, int, tree_node*) ../../gcc/cp/pt.cc:15825 0x92a171 tsubst_expr(tree_node*, tree_node*, int, tree_node*) ../../gcc/cp/pt.cc:18857 0x927cce tsubst_expr(tree_node*, tree_node*, int, tree_node*) ../../gcc/cp/pt.cc:18730 0x928678 tsubst_expr(tree_node*, tree_node*, int, tree_node*) ../../gcc/cp/pt.cc:19110 0x92b970 tsubst_expr(tree_node*, tree_node*, int, tree_node*) ../../gcc/cp/pt.cc:26707 0x92b970 instantiate_body ../../gcc/cp/pt.cc:26707 0x92c9df instantiate_decl(tree_node*, bool, bool) ../../gcc/cp/pt.cc:26997 0x9461db instantiate_pending_templates(int) ../../gcc/cp/pt.cc:27075 0x848f6a c_parse_final_cleanups() ../../gcc/cp/decl2.cc:4953