https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120337

            Bug ID: 120337
           Summary: internal compiler error: error reporting routines
                    re-entered. tuple library since version 14.1
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mario.rodriguezb1 at um dot es
  Target Milestone: ---

ICE in:

```
#include <mutex>
#include <functional>
#include <iostream>
#include <chrono>
#include <thread>
class A {
private:
   int b {0};
   std::mutex m;
public:
   void inc() {
   b++;
   }
};
int main()
{
   A a;
   std::thread t1(std::bind(&A::inc,std::ref(a)), a);
   t1.join();
}

```

Stack dump

```
/opt/compiler-explorer/gcc-trunk-20250518/include/c++/16.0.0/tuple:992:2:  
required by the constraints of 'template<class ... _Elements> template<class
... _UTypes>  requires  __disambiguating_constraint<_UTypes ...>() &&
__constructible<_UTypes ...>() && __dangles<_UTypes ...>() std::tuple<
<template-parameter-1-1> >::tuple(_UTypes&& ...)'
Segmentation fault
  990 |           && (__constructible<_UTypes...>())
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~

internal compiler error: error reporting routines re-entered.
0x2944b3e diagnostic_context::report_diagnostic(diagnostic_info*)
        ???:0
0x2944c55 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
        ???:0
0x29629c6 internal_error(char const*, ...)
        ???:0
0xad8aaa fancy_abort(char const*, int, char const*)
        ???:0
0x294406b diagnostic_context::finish()
        ???:0
0x29443b7 diagnostic_context::action_after_output(diagnostic_t)
        ???:0
0x2944a27 diagnostic_context::report_diagnostic(diagnostic_info*)
        ???:0
0x2944c55 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
        ???:0
0x29629c6 internal_error(char const*, ...)
        ???:0
0xe6b211 pp_c_specifier_qualifier_list(c_pretty_printer*, tree_node*)
        ???:0
0xe6b1f0 pp_c_specifier_qualifier_list(c_pretty_printer*, tree_node*)
        ???:0
0xe6b445 c_pretty_printer::type_id(tree_node*)
        ???:0
0xb95770 cxx_pretty_printer::type_id(tree_node*)
        ???:0
0xe6b211 pp_c_specifier_qualifier_list(c_pretty_printer*, tree_node*)
        ???:0
0xb9579a cxx_pretty_printer::type_id(tree_node*)
        ???:0
0xb958b2 cxx_pretty_printer::type_id(tree_node*)
        ???:0
0xb9779e pp_cxx_parameter_mapping(cxx_pretty_printer*, tree_node*)
        ???:0
0xbf588b expr_to_string(tree_node*)
        ???:0
0x2986373 pretty_printer::format(text_info&)
        ???:0
0x2944796 diagnostic_context::report_diagnostic(diagnostic_info*)
        ???:0
```

To quickly reproduce:

https://godbolt.org/z/vzEWKfY1b
  • [Bug c++/120337] New: internal... mario.rodriguezb1 at um dot es via Gcc-bugs

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