[Bug c++/82025] New: ICE: in finish_expr_stmt, at cp/semantics.c:678

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82025

            Bug ID: 82025
           Summary: ICE: in finish_expr_stmt, at cp/semantics.c:678
           Product: gcc
           Version: 7.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nsz at gcc dot gnu.org
  Target Milestone: ---

following code fails with ice with gcc 7.2.1 and gcc 6.3.0 (works on gcc 8):

constexpr int nlz(int x) {
  return __builtin_constant_p(x) ? 0 : 1;
}

struct A {
  constexpr A() { nlz(0); }
};

constexpr A operator-(A x) { return x; }

constexpr A bar() {
  constexpr A x;
  A y = -x;
  return y;
}

$ g++ -S bar.cpp 
bar.cpp: In function 'constexpr A bar()':
bar.cpp:13:10: internal compiler error: in finish_expr_stmt, at
cp/semantics.c:678
   A y = -x;
          ^
0x695d33 finish_expr_stmt(tree_node*)
        /S/gcc/cp/semantics.c:678
0x5c9e3f initialize_local_var
        /S/gcc/cp/decl.c:6612
0x5c9e3f cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
        /S/gcc/cp/decl.c:7173
0x65d60b cp_parser_init_declarator
        /S/gcc/cp/parser.c:19403
0x65dd97 cp_parser_simple_declaration
        /S/gcc/cp/parser.c:12786
0x65e97f cp_parser_block_declaration
        /S/gcc/cp/parser.c:12611
0x65f2a7 cp_parser_declaration_statement
        /S/gcc/cp/parser.c:12221
0x63fa27 cp_parser_statement
        /S/gcc/cp/parser.c:10708
0x640e8b cp_parser_statement_seq_opt
        /S/gcc/cp/parser.c:11040
0x640f4f cp_parser_compound_statement
        /S/gcc/cp/parser.c:10994
0x652b43 cp_parser_function_body
        /S/gcc/cp/parser.c:21455
0x652b43 cp_parser_ctor_initializer_opt_and_function_body
        /S/gcc/cp/parser.c:21493
0x6594a3 cp_parser_function_definition_after_declarator
        /S/gcc/cp/parser.c:26284
0x65da47 cp_parser_function_definition_from_specifiers_and_declarator
        /S/gcc/cp/parser.c:26196
0x65da47 cp_parser_init_declarator
        /S/gcc/cp/parser.c:19182
0x65dd97 cp_parser_simple_declaration
        /S/gcc/cp/parser.c:12786
0x65e97f cp_parser_block_declaration
        /S/gcc/cp/parser.c:12611
0x63c65b cp_parser_declaration
        /S/gcc/cp/parser.c:12509
0x662eb3 cp_parser_declaration_seq_opt
        /S/gcc/cp/parser.c:12385
0x6631e3 cp_parser_translation_unit
        /S/gcc/cp/parser.c:4368
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