[Bug c++/105223] New: [12 Regression] filter_memfn_lookup internal compiler error

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105223

            Bug ID: 105223
           Summary: [12 Regression] filter_memfn_lookup internal compiler
                    error
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mpolacek at gcc dot gnu.org
  Target Milestone: ---

Started with r12-7714-g47da5198766256:

commit 47da5198766256be658b4c321cecfd6039b0b91b
Author: Jason Merrill <jason@redhat.com>
Date:   Fri Feb 25 15:07:15 2022 -0400

    c++: using lookup within class defn [PR104476]


$ ./cc1plus -quiet ice.C
ice.C: In instantiation of ‘ServiceReference< <template-parameter-1-1>
>::ServiceReference(ServiceReferenceBase) [with <template-parameter-1-1> = int;
ServiceReferenceBase = ServiceReferenceBase]’:
ice.C:75:54:   required from here
ice.C:50:53: internal compiler error: Segmentation fault
   50 |   ServiceReference(ServiceReferenceBase) { operator=(0); }
      |                                            ~~~~~~~~~^~~
0x1773b61 crash_signal
        /home/mpolacek/src/gcc/gcc/toplev.cc:322
0xae557e tree_check(tree_node*, char const*, int, char const*, tree_code)
        /home/mpolacek/src/gcc/gcc/tree.h:3456
0xe17756 operator()
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:16411
0xe1799d filter_memfn_lookup
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:16417
0xe180ce tsubst_baselink
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:16506
0xe32588 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:21028
0xe30427 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:20658
0xe2ae60 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:19473
0xe22d0e tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:18486
0xe25b2d tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:18815
0xe22a79 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:18458
0xe25b2d tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:18815
0xe49a1f instantiate_body
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:26393
0xe4b3eb instantiate_decl(tree_node*, bool, bool)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:26685
0xe4b787 instantiate_pending_templates(int)
        /home/mpolacek/src/gcc/gcc/cp/pt.cc:26764
0xc4a2b6 c_parse_final_cleanups()
        /home/mpolacek/src/gcc/gcc/cp/decl2.cc:5113
0xf9f06d c_common_parse_file()
        /home/mpolacek/src/gcc/gcc/c-family/c-opts.cc:1262

$ cat ice.C
namespace std {
template <typename _Iterator> class reverse_iterator {
public:
  typename _Iterator::pointer operator->();
};
template <typename _Iterator>
bool operator!=(reverse_iterator<_Iterator>, reverse_iterator<_Iterator>);
} // namespace std
template <typename _Iterator> class __normal_iterator {
public:
  typedef _Iterator pointer;
};
namespace std {
template <typename> class allocator;
template <typename> struct allocator_traits;
template <typename _Tp> struct allocator_traits<allocator<_Tp>> {
  using pointer = _Tp *;
};
} // namespace std
class ServiceRegistrationBase;
struct __alloc_traits
    : std::allocator_traits<std::allocator<ServiceRegistrationBase>> {};
namespace std {
class __shared_ptr {
public:
  using element_type = int;
  element_type *get();
};
struct _Vector_base {
  typedef __alloc_traits::pointer pointer;
};
class vector {
public:
  typedef std::reverse_iterator<__normal_iterator<_Vector_base::pointer>>
      reverse_iterator;
  reverse_iterator rbegin();
  reverse_iterator rend();
};
template <typename> struct atomic;
template <typename _Tp> struct atomic<_Tp *> { _Tp *load(); };
} // namespace std
class ServiceReferenceBasePrivate;
class ServiceReferenceBase {
public:
  void operator=(decltype(nullptr));
  std::atomic<ServiceReferenceBasePrivate *> d;
};
template <class> class ServiceReference : public ServiceReferenceBase {
public:
  ServiceReference(ServiceReferenceBase) { operator=(0); }
  using ServiceReferenceBase::operator=;
};
class Bundle {
  friend std::__shared_ptr GetPrivate(Bundle);
};
class ServiceRegistrationBase {
public:
  ServiceReferenceBase GetReference();
};
class BundleContext {
public:
  Bundle GetBundle();
};
class ServiceReferenceBasePrivate {
public:
  std::__shared_ptr GetService(int *);
};
void ServiceHooksFilterServiceEventReceivers() {
  BundleContext __trans_tmp_3;
  std::vector eventListenerHooks;
  auto selfBundle = __trans_tmp_3.GetBundle();
  for (auto sriIter = eventListenerHooks.rbegin(),
            sriEnd = eventListenerHooks.rend();
       sriIter != sriEnd;) {
    ServiceReference<int> sr = sriIter->GetReference();
    int __trans_tmp_2 = *GetPrivate(selfBundle).get();
    std::__shared_ptr __trans_tmp_1 = sr.d.load()->GetService(&__trans_tmp_2),
                      elh(__trans_tmp_1);
  }
}