[Bug c++/102594] New: ICE in decay_conversion, at cp/typeck.c:2311

["gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102594

            Bug ID: 102594
           Summary: ICE in decay_conversion, at cp/typeck.c:2311
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Started with r8 :


$ cat z1.cc
struct s {
  s() {}
};
s a[1][1];
auto [b](a);


$ g++-12-20211003 -c z1.cc
z1.cc:5:11: internal compiler error: Segmentation fault
    5 | auto [b](a);
      |           ^
0xe17d4f crash_signal
        ../../gcc/toplev.c:331
0x92719a decay_conversion(tree_node*, int, bool)
        ../../gcc/cp/typeck.c:2311
0x80f80a build_vec_init(tree_node*, tree_node*, tree_node*, bool, int, int)
        ../../gcc/cp/init.c:4297
0x81012f build_vec_init(tree_node*, tree_node*, tree_node*, bool, int, int)
        ../../gcc/cp/init.c:4528
0x81062b build_aggr_init(tree_node*, tree_node*, int, int)
        ../../gcc/cp/init.c:1823
0x7ee8ed build_aggr_init_full_exprs
        ../../gcc/cp/decl.c:7048
0x7ee8ed check_initializer
        ../../gcc/cp/decl.c:7209
0x7efbb1 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
        ../../gcc/cp/decl.c:8211
0x88ecbc cp_parser_decomposition_declaration
        ../../gcc/cp/parser.c:15427
0x88ecbc cp_parser_simple_declaration
        ../../gcc/cp/parser.c:15066
0x8b642f cp_parser_declaration
        ../../gcc/cp/parser.c:14828
0x8b6ebb cp_parser_translation_unit
        ../../gcc/cp/parser.c:4987
0x8b6ebb c_parse_file()
        ../../gcc/cp/parser.c:47774
0x988802 c_common_parse_file()
        ../../gcc/c-family/c-opts.c:1237