[Bug c++/106983] New: [12/13 Regression] ICE tree check: expected class 'type', have 'exceptional' (error_mark) in type_build_dtor_call, at cp/class.cc:5794

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106983

            Bug ID: 106983
           Summary: [12/13 Regression] ICE tree check: expected class
                    'type', have 'exceptional' (error_mark) in
                    type_build_dtor_call, at cp/class.cc:5794
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Started between 20220206 and 20220213 :
(gcc configured with --enable-checking=yes)


$ cat z1.cc
// struct B {int n;};
typedef unsigned long long A;
typedef union
{
  struct B s;
  A a;
} U;
void f (A x, unsigned int b)
{
  const U y = {.a = x};
}


$ g++-13-20220918 -c z1.cc
z1.cc:5:12: error: field 's' has incomplete type 'B'
    5 |   struct B s;
      |            ^
z1.cc:5:10: note: forward declaration of 'struct B'
    5 |   struct B s;
      |          ^
z1.cc: In function 'void f(A, unsigned int)':
z1.cc:10:22: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in type_build_dtor_call, at cp/class.cc:5794
   10 |   const U y = {.a = x};
      |                      ^
0x6fc42b tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
        ../../gcc/tree.cc:8877
0x82fed0 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
        ../../gcc/tree.h:3643
0x82fed0 type_build_dtor_call(tree_node*)
        ../../gcc/cp/class.cc:5794
0xb49106 split_nonconstant_init_1
        ../../gcc/cp/typeck2.cc:600
0xb4ac4b split_nonconstant_init(tree_node*, tree_node*)
        ../../gcc/cp/typeck2.cc:739
0x8c1c71 check_initializer
        ../../gcc/cp/decl.cc:7453
0x8f0f4a cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
        ../../gcc/cp/decl.cc:8449
0xa244b3 cp_parser_init_declarator
        ../../gcc/cp/parser.cc:22997
0x9f7d82 cp_parser_simple_declaration
        ../../gcc/cp/parser.cc:15413
0x9f9939 cp_parser_declaration_statement
        ../../gcc/cp/parser.cc:14494
0x9f9feb cp_parser_statement
        ../../gcc/cp/parser.cc:12571
0x9fb114 cp_parser_statement_seq_opt
        ../../gcc/cp/parser.cc:12983
0x9fb1f7 cp_parser_compound_statement
        ../../gcc/cp/parser.cc:12935
0xa231a0 cp_parser_function_body
        ../../gcc/cp/parser.cc:25285
0xa231a0 cp_parser_ctor_initializer_opt_and_function_body
        ../../gcc/cp/parser.cc:25336
0xa2381a cp_parser_function_definition_after_declarator
        ../../gcc/cp/parser.cc:31480
0xa24d5c cp_parser_function_definition_from_specifiers_and_declarator
        ../../gcc/cp/parser.cc:31397
0xa24d5c cp_parser_init_declarator
        ../../gcc/cp/parser.cc:22735
0x9f7d82 cp_parser_simple_declaration
        ../../gcc/cp/parser.cc:15413
0xa2c49f cp_parser_declaration
        ../../gcc/cp/parser.cc:15099