https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85148
Bug ID: 85148 Summary: [6/7/8 Regression] ICE with NSDMI and this pointer Product: gcc Version: 8.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: reichelt at gcc dot gnu.org Target Milestone: --- The following valid code snippet triggers an ICE since GCC 5.1.0 (it was wrongly rejected in GCC 4.9.4): ===================================== template<typename T> struct A { T x[1]{(__PTRDIFF_TYPE__)this}; }; void foo() { A<A<__PTRDIFF_TYPE__>> a{}; } ===================================== bug.cc: In function 'void foo()': bug.cc:8:28: internal compiler error: in replace_placeholders_r, at cp/tree.c:3148 A<A<__PTRDIFF_TYPE__>> a{}; ^ 0x667871 replace_placeholders_r ../../gcc/gcc/cp/tree.c:3148 0x116564b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*)) ../../gcc/gcc/tree.c:11387 0x9d03b0 replace_placeholders_r ../../gcc/gcc/cp/tree.c:3188 0x116564b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*)) ../../gcc/gcc/tree.c:11387 0x9d03b0 replace_placeholders_r ../../gcc/gcc/cp/tree.c:3188 0x116564b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*)) ../../gcc/gcc/tree.c:11387 0x9d03b0 replace_placeholders_r ../../gcc/gcc/cp/tree.c:3188 0x116564b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*)) ../../gcc/gcc/tree.c:11387 0x9d03b0 replace_placeholders_r ../../gcc/gcc/cp/tree.c:3188 0x116564b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*)) ../../gcc/gcc/tree.c:11387 0x9d51d1 replace_placeholders(tree_node*, tree_node*, bool*) ../../gcc/gcc/cp/tree.c:3226 0x9f4bb3 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc, vl_embed>**, int) ../../gcc/gcc/cp/typeck2.c:851 0x887daa check_initializer ../../gcc/gcc/cp/decl.c:6469 0x89ffdc cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int) ../../gcc/gcc/cp/decl.c:7127 0x93c97b cp_parser_init_declarator ../../gcc/gcc/cp/parser.c:19741 0x943e28 cp_parser_simple_declaration ../../gcc/gcc/cp/parser.c:13059 0x944c38 cp_parser_block_declaration ../../gcc/gcc/cp/parser.c:12884 0x945669 cp_parser_declaration_statement ../../gcc/gcc/cp/parser.c:12478 0x923a73 cp_parser_statement ../../gcc/gcc/cp/parser.c:10927 0x9249e0 cp_parser_statement_seq_opt ../../gcc/gcc/cp/parser.c:11276 Please submit a full bug report, [etc.]