https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84329
Bug ID: 84329
Summary: ICE with broken return type of generic lambda
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: error-recovery, ice-on-invalid-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 invalid code snippet triggers an ICE since GCC 4.9.0
(when generic lambdas were introduced):
==============================================
auto a([](auto) -> decltype((void)) {});
==============================================
bug.cc:1:30: error: expected primary-expression before 'void'
auto a([](auto) -> decltype((void)) {});
^~~~
bug.cc:1:30: error: expected ')' before 'void'
auto a([](auto) -> decltype((void)) {});
~^~~~
)
bug.cc:1:20: internal compiler error: in dependent_type_p, at cp/pt.c:23976
auto a([](auto) -> decltype((void)) {});
^~~~~~~~
0x63478b dependent_type_p(tree_node*)
../../gcc/gcc/cp/pt.c:23976
0x886e44 require_complete_types_for_parms
../../gcc/gcc/cp/decl.c:12497
0x886e44 check_function_type
../../gcc/gcc/cp/decl.c:14667
0x886e44 start_preparsed_function(tree_node*, tree_node*, int)
../../gcc/gcc/cp/decl.c:14884
0x8d8254 start_lambda_function(tree_node*, tree_node*)
../../gcc/gcc/cp/lambda.c:1371
0x91d69d cp_parser_lambda_body
../../gcc/gcc/cp/parser.c:10656
0x91d69d cp_parser_lambda_expression
../../gcc/gcc/cp/parser.c:10174
0x91d69d cp_parser_primary_expression
../../gcc/gcc/cp/parser.c:5257
0x93000c cp_parser_postfix_expression
../../gcc/gcc/cp/parser.c:7026
0x930be0 cp_parser_unary_expression
../../gcc/gcc/cp/parser.c:8318
0x91101f cp_parser_cast_expression
../../gcc/gcc/cp/parser.c:9086
0x91182a cp_parser_binary_expression
../../gcc/gcc/cp/parser.c:9187
0x912ff4 cp_parser_assignment_expression
../../gcc/gcc/cp/parser.c:9474
0x91214b cp_parser_constant_expression
../../gcc/gcc/cp/parser.c:9758
0x914d79 cp_parser_parenthesized_expression_list
../../gcc/gcc/cp/parser.c:7754
0x915864 cp_parser_initializer
../../gcc/gcc/cp/parser.c:21832
0x934786 cp_parser_init_declarator
../../gcc/gcc/cp/parser.c:19646
0x93bac8 cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:13038
0x93c8d8 cp_parser_block_declaration
../../gcc/gcc/cp/parser.c:12863
0x940832 cp_parser_declaration
../../gcc/gcc/cp/parser.c:12761
Please submit a full bug report, [etc.]
