https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120873
Bug ID: 120873
Summary: internal compiler error: error reporting routines
re-entered. since 11.1
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: ---
Program:
```
#include <iostream>
using namespace std;
template <class T>
void myFunc(T a, decltype(cout << a) o=cout) {
cout << o << endl;
}
int main() {
myFunc(5);
}
```
Stack dump:
```
internal compiler error: error reporting routines re-entered.
0x284430e diagnostic_context::report_diagnostic(diagnostic_info*)
???:0
0x2844425 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x28668af error_at(unsigned long, char const*, ...)
???:0
0xb72b2a satisfaction_cache::get()
???:0
0xb79b68 constraints_satisfied_p(tree_node*, tree_node*)
???:0
0xd4c236 tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd4b94b tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd74a1d instantiate_template(tree_node*, tree_node*, int)
???:0
0xd7740a fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
???:0
0xb287c6 build_new_op(op_location_t const&, tree_code, int, tree_node*,
tree_node*, tree_node*, tree_node*, tree_node**, int)
???:0
0xdd98b2 build_x_binary_op(op_location_t const&, tree_code, tree_node*,
tree_code, tree_node*, tree_code, tree_node*, tree_node**, int)
???:0
0xd4bb3d tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0x28a4493 pretty_printer::format(text_info&)
???:0
0x28a9c53 pp_verbatim(pretty_printer*, char const*, ...)
???:0
0x2864678 diagnostic_text_output_format::on_report_diagnostic(diagnostic_info
const&, diagnostic_t)
???:0
0x2843f76 diagnostic_context::report_diagnostic(diagnostic_info*)
???:0
0x2844425 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x2866fc6 internal_error(char const*, ...)
???:0
0xaede72 fancy_abort(char const*, int, char const*)
???:0
0x284383b diagnostic_context::finish()
???:0
```
To quickly reproduce:
https://godbolt.org/z/oKocEexe6
