[Bug c++/79822] New: [7 Regression] ICE with void statement expression

["reichelt at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79822

            Bug ID: 79822
           Summary: [7 Regression] ICE with void statement expression
           Product: gcc
           Version: unknown
            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
  Target Milestone: ---

The following invalid code snippet triggers an ICE on trunk:

==============================
bool foo()
{
  return ({ ; }) && false;
}
==============================

bug.cc: In function 'bool foo()':
bug.cc:3:18: internal compiler error: Segmentation fault
   return ({ ; }) && false;
                  ^~
0xd5fe0f crash_signal
        ../../gcc/gcc/toplev.c:337
0x836879 reduced_constant_expression_p(tree_node*)
        ../../gcc/gcc/cp/constexpr.c:1708
0x8369d4 verify_constant
        ../../gcc/gcc/cp/constexpr.c:1741
0x8425f7 cxx_eval_outermost_constant_expr
        ../../gcc/gcc/cp/constexpr.c:4618
0x845906 maybe_constant_value(tree_node*, tree_node*)
        ../../gcc/gcc/cp/constexpr.c:4830
0x8206aa cp_fully_fold(tree_node*)
        ../../gcc/gcc/cp/cp-gimplify.c:1963
0x727267 cp_parser_binary_expression
        ../../gcc/gcc/cp/parser.c:8936
0x7276c4 cp_parser_assignment_expression
        ../../gcc/gcc/cp/parser.c:9168
0x72b3d8 cp_parser_expression
        ../../gcc/gcc/cp/parser.c:9337
0x7199aa cp_parser_jump_statement
        ../../gcc/gcc/cp/parser.c:12147
0x7199aa cp_parser_statement
        ../../gcc/gcc/cp/parser.c:10581
0x71a25d cp_parser_statement_seq_opt
        ../../gcc/gcc/cp/parser.c:11027
0x71a32f cp_parser_compound_statement
        ../../gcc/gcc/cp/parser.c:10981
0x71a4c3 cp_parser_function_body
        ../../gcc/gcc/cp/parser.c:21428
0x71a4c3 cp_parser_ctor_initializer_opt_and_function_body
        ../../gcc/gcc/cp/parser.c:21466
0x71ad41 cp_parser_function_definition_after_declarator
        ../../gcc/gcc/cp/parser.c:26253
0x71ba2d cp_parser_function_definition_from_specifiers_and_declarator
        ../../gcc/gcc/cp/parser.c:26165
0x71ba2d cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:19155
0x73f6cc cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:12773
0x740475 cp_parser_block_declaration
        ../../gcc/gcc/cp/parser.c:12598
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