[Bug c++/60375] New: [4.9 Regression] ICE with invalid use of lambda

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60375

            Bug ID: 60375
           Summary: [4.9 Regression] ICE with invalid use of lambda
           Product: gcc
           Version: 4.9.0
            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

The following invalid testcase (compiled with "-std=c++11") triggers
an ICE on trunk:

===============================================
struct A
{
  decltype( [](){ return this; }() ) x;
};
===============================================

bug.cc:3:13: error: lambda-expression in unevaluated context
   decltype( [](){ return this; }() ) x;
             ^
bug.cc: In lambda function:
bug.cc:3:26: internal compiler error: Segmentation fault
   decltype( [](){ return this; }() ) x;
                          ^
0xbaa60f crash_signal
        ../../gcc/gcc/toplev.c:337
0x7587ed contains_struct_check
        ../../gcc/gcc/tree.h:2822
0x7587ed rvalue(tree_node*)
        ../../gcc/gcc/cp/tree.c:698
0x6b5fd2 cp_parser_primary_expression
        ../../gcc/gcc/cp/parser.c:4353
0x6b84cd cp_parser_postfix_expression
        ../../gcc/gcc/cp/parser.c:5971
0x6bb493 cp_parser_unary_expression
        ../../gcc/gcc/cp/parser.c:7170
0x6bc17f cp_parser_binary_expression
        ../../gcc/gcc/cp/parser.c:7874
0x6bc661 cp_parser_assignment_expression
        ../../gcc/gcc/cp/parser.c:8112
0x6bea73 cp_parser_expression
        ../../gcc/gcc/cp/parser.c:8274
0x6b7bf2 cp_parser_expression
        ../../gcc/gcc/cp/parser.c:8313
0x6b7bf2 cp_parser_lambda_body
        ../../gcc/gcc/cp/parser.c:9228
0x6b7bf2 cp_parser_lambda_expression
        ../../gcc/gcc/cp/parser.c:8757
0x6b7bf2 cp_parser_primary_expression
        ../../gcc/gcc/cp/parser.c:4305
0x6b84cd cp_parser_postfix_expression
        ../../gcc/gcc/cp/parser.c:5971
0x6b9a3e cp_parser_decltype_expr
        ../../gcc/gcc/cp/parser.c:11904
0x6b9a3e cp_parser_decltype
        ../../gcc/gcc/cp/parser.c:12003
0x6ba117 cp_parser_qualifying_entity
        ../../gcc/gcc/cp/parser.c:5494
0x6ba117 cp_parser_nested_name_specifier_opt
        ../../gcc/gcc/cp/parser.c:5249
0x6baadb cp_parser_nested_name_specifier
        ../../gcc/gcc/cp/parser.c:5448
0x6b2cd3 cp_parser_using_declaration
        ../../gcc/gcc/cp/parser.c:15938
Please submit a full bug report, [etc.]