https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85229
Bug ID: 85229 Summary: .[concepts] ICE with local class in lambda Product: gcc Version: 8.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: reichelt at gcc dot gnu.org Blocks: 67491 Target Milestone: --- The following invalid code snippet (compiled with "-fconcepts") triggers an ICE since GCC 6.1.0 (when concepts were introduced): ========================================= template<typename> concept bool C = [] { struct A { C{T} void foo(); }; }; ========================================= bug.cc: In lambda function: bug.cc:5:20: internal compiler error: in check_member_template, at cp/decl2.c:573 C{T} void foo(); ^ 0x8b06cb check_member_template(tree_node*) ../../gcc/gcc/cp/decl2.c:573 0x94e5c4 finish_member_template_decl(tree_node*) ../../gcc/gcc/cp/pt.c:307 0x943832 cp_parser_template_declaration_after_parameters ../../gcc/gcc/cp/parser.c:26911 0x9440a6 cp_parser_template_introduction ../../gcc/gcc/cp/parser.c:27056 0x9440a6 cp_parser_template_declaration_after_export ../../gcc/gcc/cp/parser.c:27157 0x92e583 cp_parser_member_declaration ../../gcc/gcc/cp/parser.c:23467 0x92f7fa cp_parser_member_specification_opt ../../gcc/gcc/cp/parser.c:23389 0x92f7fa cp_parser_class_specifier_1 ../../gcc/gcc/cp/parser.c:22521 0x9318f9 cp_parser_class_specifier ../../gcc/gcc/cp/parser.c:22783 0x9318f9 cp_parser_type_specifier ../../gcc/gcc/cp/parser.c:16766 0x93ec56 cp_parser_decl_specifier_seq ../../gcc/gcc/cp/parser.c:13617 0x944370 cp_parser_simple_declaration ../../gcc/gcc/cp/parser.c:12927 0x945318 cp_parser_block_declaration ../../gcc/gcc/cp/parser.c:12874 0x945d49 cp_parser_declaration_statement ../../gcc/gcc/cp/parser.c:12468 0x9241c3 cp_parser_statement ../../gcc/gcc/cp/parser.c:10917 0x925130 cp_parser_statement_seq_opt ../../gcc/gcc/cp/parser.c:11266 0x925c07 cp_parser_lambda_body ../../gcc/gcc/cp/parser.c:10677 0x925c07 cp_parser_lambda_expression ../../gcc/gcc/cp/parser.c:10178 0x925c07 cp_parser_primary_expression ../../gcc/gcc/cp/parser.c:5263 0x93894c cp_parser_postfix_expression ../../gcc/gcc/cp/parser.c:7022 Please submit a full bug report, [etc.] Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 [Bug 67491] [meta-bug] concepts issues