[Bug c++/79654] New: [7 Regression] ICE on invalid c++ code in register_dtor_fn in cp/decl.c:7877

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79654

            Bug ID: 79654
           Summary: [7 Regression] ICE on invalid c++ code in
                    register_dtor_fn in cp/decl.c:7877
           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: marxin at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org
  Target Milestone: ---

Created attachment 40792
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40792&action=edit
test-case

Also adopted from clang, however this one is very recent regression (started
with r245218):

$ g++
/home/marxin/BIG/Programming/llvm-project/llvm/tools/clang/test/CodeGenCXX/cxx1z-decomposition.cpp
-std=c++14

...

/home/marxin/BIG/Programming/llvm-project/llvm/tools/clang/test/CodeGenCXX/cxx1z-decomposition.cpp:
In function ‘void __static_initialization_and_destruction_0(int, int)’:
/home/marxin/BIG/Programming/llvm-project/llvm/tools/clang/test/CodeGenCXX/cxx1z-decomposition.cpp:44:6:
internal compiler error: tree check: expected class ‘type’, have ‘exceptional’
(error_mark) in register_dtor_fn, at cp/decl.c:7877
 auto [d1, d2] = make<D>();
      ^~~~~~~~
0x1541400 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
        ../../gcc/tree.c:9866
0x80d58e tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
        ../../gcc/tree.h:3187
0x85f3cc register_dtor_fn(tree_node*)
        ../../gcc/cp/decl.c:7877
0x9680f0 one_static_initialization_or_destruction
        ../../gcc/cp/decl2.c:3756
0x9685f7 do_static_initialization_or_destruction
        ../../gcc/cp/decl2.c:3843
0x96ad87 c_parse_final_cleanups()
        ../../gcc/cp/decl2.c:4602
0xb8ea37 c_common_parse_file()
        ../../gcc/c-family/c-opts.c:1134