[Bug c++/71756] New: internal compiler error: in ~saved_token_sentinel, at cp/parser.c:1228

["vegard.nossum at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71756

            Bug ID: 71756
           Summary: internal compiler error: in ~saved_token_sentinel, at
                    cp/parser.c:1228
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vegard.nossum at gmail dot com
  Target Milestone: ---

Using this:

struct t {
        template<class F>
        t(F &&f)
        {
        }
};

void foo()
{
        (t([const &x]() { int y; }));
}

I get:

$ g++ internal-compiler-error.cc -lpthread
internal-compiler-error.cc: In lambda function:
internal-compiler-error.cc:10:25: internal compiler error: in
~saved_token_sentinel, at cp/parser.c:1228
  (t([const &x]() { int y; }));
                         ^
0x76d1e7 saved_token_sentinel::~saved_token_sentinel()
        /home/vegard/git/gcc/gcc/cp/parser.c:1228
0x76d1e7 cp_parser_statement
        /home/vegard/git/gcc/gcc/cp/parser.c:10350
0x76d524 cp_parser_statement_seq_opt
        /home/vegard/git/gcc/gcc/cp/parser.c:10804
0x772f5e cp_parser_lambda_body
        /home/vegard/git/gcc/gcc/cp/parser.c:10270
0x772f5e cp_parser_lambda_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:9754
0x746284 cp_parser_primary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:4934
0x7512c6 cp_parser_postfix_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:6688
0x74f794 cp_parser_unary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:7986
0x759867 cp_parser_cast_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:8663
0x759e16 cp_parser_binary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:8764
0x75a6d0 cp_parser_assignment_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:9051
0x75c2b6 cp_parser_parenthesized_expression_list
        /home/vegard/git/gcc/gcc/cp/parser.c:7457
0x75cd41 cp_parser_functional_cast
        /home/vegard/git/gcc/gcc/cp/parser.c:25943
0x7511d3 cp_parser_postfix_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:6616
0x74f794 cp_parser_unary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:7986
0x759867 cp_parser_cast_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:8663
0x759e16 cp_parser_binary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:8764
0x75a6d0 cp_parser_assignment_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:9051
0x75d06a cp_parser_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:9220
0x74613e cp_parser_primary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:4879
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

$ gcc --version
gcc (GCC) 7.0.0 20160520 (experimental)