[Bug c++/104432] New: [12 Regression] ICE in operator() from filter_memfn_lookup since r12-6080

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104432

            Bug ID: 104432
           Summary: [12 Regression] ICE in operator() from
                    filter_memfn_lookup since r12-6080
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
  Target Milestone: ---

Since r12-6080-gab85331c58223e483c55ff0316a92265d7910e9b the following testcase
ICEs:
rh2051651.C: In instantiation of ‘void E< <template-parameter-1-1> >::bar()
[with <template-parameter-1-1> = int]’:
rh2051651.C:22:8:   required from here
rh2051651.C:22:38: internal compiler error: in operator(), at cp/pt.c:16271
   22 |   void bar () { for (auto i : b) foo (i); }
      |                                  ~~~~^~~
0xddb7b4 operator()
        ../../gcc/cp/pt.c:16271
0xddbac4 filter_memfn_lookup
        ../../gcc/cp/pt.c:16276
0xddc1cf tsubst_baselink
        ../../gcc/cp/pt.c:16363
0xdf6444 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc/cp/pt.c:20864
0xdf42e3 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc/cp/pt.c:20494
0xdeed6a tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc/cp/pt.c:19313
0xde6c18 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc/cp/pt.c:18326
0xde8c90 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc/cp/pt.c:18557
0xde9a37 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc/cp/pt.c:18655
0xe0d76a instantiate_body
        ../../gcc/cp/pt.c:26236
0xe0f136 instantiate_decl(tree_node*, bool, bool)
        ../../gcc/cp/pt.c:26529
0xe0f4d2 instantiate_pending_templates(int)
        ../../gcc/cp/pt.c:26608
0xc10624 c_parse_final_cleanups()
        ../../gcc/cp/decl2.c:5097
0xf5edcd c_common_parse_file()
        ../../gcc/c-family/c-opts.c:1260
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

struct A {
  int operator* ();
  void operator++ ();
  bool operator!= (A);
};
struct B {
  A begin ();
  A end ();
};
struct C {
  template <typename>
  void foo ();
};
struct D : public C {
  void foo (int);
  virtual void bar ();
};
template <typename = int> struct E : D {
  using D::foo;
  using C::foo;
  B b;
  void bar () { for (auto i : b) foo (i); }
};
struct F {
  using G = E<>;
  F() {}
  G g;
};