https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81024
Bug ID: 81024 Summary: ICE within convert_like_real Product: gcc Version: 8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: dmalcolm at gcc dot gnu.org Target Milestone: --- Found by Alec Teal; reported to me over IRC. Seen with gcc 4.8 and with trunk (r248825). $ cat main.cc namespace std { template<class T> class initializer_list; } void WtfTest(int, const char*, const char*, const ::std::initializer_list<const char*>&); #define WTF(...) WtfTest(__LINE__,__FILE__,"potato",{__VA_ARGS__}); int main() { WTF("it","works") } gcc main.cc main.cc: In function ‘int main()’: main.cc:5:66: internal compiler error: Segmentation fault #define WTF(...) WtfTest(__LINE__,__FILE__,"potato",{__VA_ARGS__}); ^ main.cc:6:14: note: in expansion of macro ‘WTF’ int main() { WTF("it","works") } ^~~ 0xb7f806 crash_signal ../../src/gcc/toplev.c:338 0x60797d convert_like_real ../../src/gcc/cp/call.c:6805 0x6076bc convert_like_real ../../src/gcc/cp/call.c:6838 0x60a4cd build_over_call ../../src/gcc/cp/call.c:7840 0x61250e build_new_function_call(tree_node*, vec<tree_node*, va_gc, vl_embed>**, int) ../../src/gcc/cp/call.c:4262 0x727d25 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool, bool, int) ../../src/gcc/cp/semantics.c:2479 0x6c990d cp_parser_postfix_expression ../../src/gcc/cp/parser.c:6998 0x6d0446 cp_parser_unary_expression ../../src/gcc/cp/parser.c:8117 0x6d0f65 cp_parser_cast_expression ../../src/gcc/cp/parser.c:8796 0x6d1562 cp_parser_binary_expression ../../src/gcc/cp/parser.c:8898 0x6d1cb2 cp_parser_assignment_expression ../../src/gcc/cp/parser.c:9186 0x6d923a cp_parser_expression ../../src/gcc/cp/parser.c:9353 0x6da32a cp_parser_expression_statement ../../src/gcc/cp/parser.c:10912 0x6c5376 cp_parser_statement ../../src/gcc/cp/parser.c:10728 0x6c6377 cp_parser_statement_seq_opt ../../src/gcc/cp/parser.c:11054 0x6c642f cp_parser_compound_statement ../../src/gcc/cp/parser.c:11008 0x6e1330 cp_parser_function_body ../../src/gcc/cp/parser.c:21447 0x6e1330 cp_parser_ctor_initializer_opt_and_function_body ../../src/gcc/cp/parser.c:21483 0x6e1b2e cp_parser_function_definition_after_declarator ../../src/gcc/cp/parser.c:26291 0x6e2a9c cp_parser_function_definition_from_specifiers_and_declarator ../../src/gcc/cp/parser.c:26203