[Bug tree-optimization/95984] New: [11 Regression] Internal compiler error: Error reporting routines re-entered. since r11-1697-g75ff24e1920ea6b1

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95984

            Bug ID: 95984
           Summary: [11 Regression] Internal compiler error: Error
                    reporting routines re-entered. since
                    r11-1697-g75ff24e1920ea6b1
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: msebor at gcc dot gnu.org
  Target Milestone: ---

Since the revision I see:

$ cat
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic6.C
// PR c++/78816
// { dg-do compile { target c++14 } }

void f(void (*f1)(int)) {
  f1(42);
}

template <typename Lambda>
static auto callback(Lambda &&l)
{
  static auto* p = &l;
  p = &l;
  return [](auto... x){ return (*p)(x...); };
}

int main() {
  int x = 5;
  f(callback([=](int y){}));
}

$ g++
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic6.C
-Wnonnull
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic6.C:
In substitution of ‘template<class ... auto:1> constexpr
callback<main()::<lambda(int)> >::<lambda(auto:1 ...)>::operator decltype
(((const callback<main()::<lambda(int)> >::<lambda(auto:1
...)>*)0)->operator()<auto:1
...>(static_cast<auto:1&&>(callback::._anon_2::_FUN::<unnamed>) ...))
(*)(auto:1 ...)() const [with auto:1 = {int}]’:
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic6.C:18:27:
  required from here
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic6.C:13:10:
warning: ‘this’ pointer null [-Wnonnull]
   13 |   return [](auto... x){ return (*p)(x...); };
      |          ^
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic6.C:13:10:
note: in a call to non-static member function ‘callback<main()::<lambda(int)>
>::<lambda(auto:1 ...)> [with auto:1 = {int}]’
‘
Internal compiler error: Error reporting routines re-entered.
0xb04ef1 check_nonnull_arg
        /home/marxin/Programming/gcc/gcc/c-family/c-common.c:5523
0xb05f72 check_function_arguments_recurse(void (*)(void*, tree_node*, unsigned
long), void*, tree_node*, unsigned long)
        /home/marxin/Programming/gcc/gcc/c-family/c-common.c:5881
0xb05cd1 check_function_arguments_recurse(void (*)(void*, tree_node*, unsigned
long), void*, tree_node*, unsigned long)
        /home/marxin/Programming/gcc/gcc/c-family/c-common.c:5813
0xb043e8 check_function_nonnull
        /home/marxin/Programming/gcc/gcc/c-family/c-common.c:5315
0xb05a9e check_function_arguments(unsigned int, tree_node const*, tree_node
const*, int, tree_node**, vec<unsigned int, va_heap, vl_ptr>*)
        /home/marxin/Programming/gcc/gcc/c-family/c-common.c:5764
0x867a94 build_over_call
        /home/marxin/Programming/gcc/gcc/cp/call.c:8868
0x869e3c build_new_method_call_1
        /home/marxin/Programming/gcc/gcc/cp/call.c:10348
0x86ad5f build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
        /home/marxin/Programming/gcc/gcc/cp/call.c:10423
0xa2b3f2 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:20042
0xa2d1c0 tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:15913
0x935ad7 dump_template_bindings
        /home/marxin/Programming/gcc/gcc/cp/error.c:416
0x935d30 dump_substitution
        /home/marxin/Programming/gcc/gcc/cp/error.c:1562
0x935d30 dump_substitution
        /home/marxin/Programming/gcc/gcc/cp/error.c:1550
0x92f610 dump_function_decl
        /home/marxin/Programming/gcc/gcc/cp/error.c:1720
0x937178 decl_to_string
        /home/marxin/Programming/gcc/gcc/cp/error.c:3101
0x937178 cp_printer
        /home/marxin/Programming/gcc/gcc/cp/error.c:4261
0x1e2aafc pp_format(pretty_printer*, text_info*)
        /home/marxin/Programming/gcc/gcc/pretty-print.c:1475
0x1e2cb80 pp_format_verbatim(pretty_printer*, text_info*)
        /home/marxin/Programming/gcc/gcc/pretty-print.c:1536
0x1e2cb80 pp_verbatim(pretty_printer*, char const*, ...)
        /home/marxin/Programming/gcc/gcc/pretty-print.c:1790
0x92ce56 print_instantiation_full_context
        /home/marxin/Programming/gcc/gcc/cp/error.c:3503
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