https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87425
Bug ID: 87425 Summary: [9 Regression] ICE with virtual assignment operator Product: gcc Version: 9.0 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 CC: jakub at gcc dot gnu.org, mpolacek at gcc dot gnu.org Target Milestone: --- The following valid code snippet (compiled with "-std=c++2a") triggers an ICE on trunk: ================================= struct A { virtual A& operator= (int); }; struct B { A a; B() { a = 0; } }; ================================= bug.cc: In constructor 'B::B()': bug.cc:9:14: internal compiler error: Segmentation fault 9 | B() { a = 0; } | ^ 0xed7eef crash_signal ../../gcc/gcc/toplev.c:325 0x8760fc tree_check(tree_node*, char const*, int, char const*, tree_code) ../../gcc/gcc/tree.h:3112 0x8760fc cxx_eval_constant_expression ../../gcc/gcc/cp/constexpr.c:4821 0x8791be cxx_eval_outermost_constant_expr ../../gcc/gcc/cp/constexpr.c:5018 0x87c6fc maybe_constant_init_1 ../../gcc/gcc/cp/constexpr.c:5366 0x8914f0 cp_get_fndecl_from_callee(tree_node*, bool) ../../gcc/gcc/cp/cvt.c:967 0x8915fb maybe_warn_nodiscard ../../gcc/gcc/cp/cvt.c:1016 0x891ea7 convert_to_void(tree_node*, impl_conv_void, int) ../../gcc/gcc/cp/cvt.c:1398 0x9c15a0 finish_expr_stmt(tree_node*) ../../gcc/gcc/cp/semantics.c:686 0x93e977 cp_parser_statement ../../gcc/gcc/cp/parser.c:10963 0x93fe98 cp_parser_statement_seq_opt ../../gcc/gcc/cp/parser.c:11302 0x93ff7f cp_parser_compound_statement ../../gcc/gcc/cp/parser.c:11256 0x956100 cp_parser_function_body ../../gcc/gcc/cp/parser.c:21930 0x956100 cp_parser_ctor_initializer_opt_and_function_body ../../gcc/gcc/cp/parser.c:21967 0x956970 cp_parser_function_definition_after_declarator ../../gcc/gcc/cp/parser.c:26982 0x9585ec cp_parser_late_parsing_for_member ../../gcc/gcc/cp/parser.c:27862 0x94b1ff cp_parser_class_specifier_1 ../../gcc/gcc/cp/parser.c:22906 0x94c1eb cp_parser_class_specifier ../../gcc/gcc/cp/parser.c:22932 0x94c1eb cp_parser_type_specifier ../../gcc/gcc/cp/parser.c:16920 0x958d19 cp_parser_decl_specifier_seq ../../gcc/gcc/cp/parser.c:13757 Please submit a full bug report, [etc.] This seems to be related to PR87398.