http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59097
Bug ID: 59097 Summary: [4.7/4.8/4.9 Regression] ICE with invalid statement expression as array size Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: reichelt at gcc dot gnu.org The following invalid code snippet triggers an ICE since GCC 4.6.0: ============================ void foo() { int x[({ return; })]; } ============================ bug.cc: In function 'void foo()': bug.cc:3:22: internal compiler error: Segmentation fault int x[({ return; })]; ^ 0xb2bf3f crash_signal ../../gcc/gcc/toplev.c:334 0x6dac34 cxx_eval_constant_expression ../../gcc/gcc/cp/semantics.c:9350 0x6db91b cxx_eval_constant_expression ../../gcc/gcc/cp/semantics.c:9453 0x6de4d6 cxx_eval_outermost_constant_expr ../../gcc/gcc/cp/semantics.c:9725 0x6e119b maybe_constant_value(tree_node*) ../../gcc/gcc/cp/semantics.c:9835 0x567450 compute_array_index_type(tree_node*, tree_node*, int) ../../gcc/gcc/cp/decl.c:8227 0x589075 create_array_type_for_decl ../../gcc/gcc/cp/decl.c:8540 0x589075 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*, decl_context, int, tree_node**) ../../gcc/gcc/cp/decl.c:9486 0x58d8f4 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int, tree_node*, tree_node*, tree_node**) ../../gcc/gcc/cp/decl.c:4469 0x6664a2 cp_parser_init_declarator ../../gcc/gcc/cp/parser.c:16567 0x667edf cp_parser_simple_declaration ../../gcc/gcc/cp/parser.c:11107 0x64bdf0 cp_parser_block_declaration ../../gcc/gcc/cp/parser.c:10988 0x64cf13 cp_parser_declaration_statement ../../gcc/gcc/cp/parser.c:10635 0x64d587 cp_parser_statement ../../gcc/gcc/cp/parser.c:9376 0x64e289 cp_parser_statement_seq_opt ../../gcc/gcc/cp/parser.c:9654 0x64e3fe cp_parser_compound_statement ../../gcc/gcc/cp/parser.c:9608 0x661a8b cp_parser_function_body ../../gcc/gcc/cp/parser.c:18461 0x661a8b cp_parser_ctor_initializer_opt_and_function_body ../../gcc/gcc/cp/parser.c:18497 0x665e8f cp_parser_function_definition_after_declarator ../../gcc/gcc/cp/parser.c:22520 0x666c62 cp_parser_function_definition_from_specifiers_and_declarator ../../gcc/gcc/cp/parser.c:22441 Please submit a full bug report, [etc.] A slightly different testcase produces a different ICE: ============================ void foo() { int x[({ L: ; })]; } ============================ bug.cc: In function 'void foo()': bug.cc:3:19: internal compiler error: unexpected expression '<statement>' of kind label_expr int x[({ L: ; })]; ^ 0x6db55d cxx_eval_constant_expression ../../gcc/gcc/cp/semantics.c:9705 0x6de4d6 cxx_eval_outermost_constant_expr ../../gcc/gcc/cp/semantics.c:9725 0x6e119b maybe_constant_value(tree_node*) ../../gcc/gcc/cp/semantics.c:9835 0x567450 compute_array_index_type(tree_node*, tree_node*, int) ../../gcc/gcc/cp/decl.c:8227 0x589075 create_array_type_for_decl ../../gcc/gcc/cp/decl.c:8540 0x589075 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*, decl_context, int, tree_node**) ../../gcc/gcc/cp/decl.c:9486 0x58d8f4 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int, tree_node*, tree_node*, tree_node**) ../../gcc/gcc/cp/decl.c:4469 0x6664a2 cp_parser_init_declarator ../../gcc/gcc/cp/parser.c:16567 0x667edf cp_parser_simple_declaration ../../gcc/gcc/cp/parser.c:11107 0x64bdf0 cp_parser_block_declaration ../../gcc/gcc/cp/parser.c:10988 0x64cf13 cp_parser_declaration_statement ../../gcc/gcc/cp/parser.c:10635 0x64d587 cp_parser_statement ../../gcc/gcc/cp/parser.c:9376 0x64e289 cp_parser_statement_seq_opt ../../gcc/gcc/cp/parser.c:9654 0x64e3fe cp_parser_compound_statement ../../gcc/gcc/cp/parser.c:9608 0x661a8b cp_parser_function_body ../../gcc/gcc/cp/parser.c:18461 0x661a8b cp_parser_ctor_initializer_opt_and_function_body ../../gcc/gcc/cp/parser.c:18497 0x665e8f cp_parser_function_definition_after_declarator ../../gcc/gcc/cp/parser.c:22520 0x666c62 cp_parser_function_definition_from_specifiers_and_declarator ../../gcc/gcc/cp/parser.c:22441 0x666c62 cp_parser_init_declarator ../../gcc/gcc/cp/parser.c:16472 0x667edf cp_parser_simple_declaration ../../gcc/gcc/cp/parser.c:11107 Please submit a full bug report, [etc.]