https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120532
Bug ID: 120532
Summary: diagnostic_context::diagnostic_impl ICE in refwrap.h
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: ---
Maybe related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120339.
## Program
```
#include <iostream>
#include <vector>
using my_func = void(int) &&;
int main()
{
std::vector<std::reference_wrapper<my_func>> vec;
}
```
## Stack dump
```
/opt/compiler-explorer/gcc-trunk-20250604/include/c++/16.0.0/bits/refwrap.h:335:53:
internal compiler error: Segmentation fault
335 | =
decltype(reference_wrapper::_S_fun(std::declval<_Up>()))>
|
~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
0x282a0a5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x284b7e6 internal_error(char const*, ...)
???:0
0xd383cd tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd38954 tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd66c3c instantiate_class_template(tree_node*)
???:0
0xdc3644 complete_type_or_maybe_complain(tree_node*, tree_node*, int)
???:0
0xdd6a2a cp_build_binary_op(op_location_t const&, tree_code, tree_node*,
tree_node*, int)
???:0
0xb17eb4 build_new_op(op_location_t const&, tree_code, int, tree_node*,
tree_node*, tree_node*, tree_node*, tree_node**, int)
???:0
0xdc60d2 build_x_binary_op(op_location_t const&, tree_code, tree_node*,
tree_code, tree_node*, tree_code, tree_node*, tree_node**, int)
???:0
0xd5ae6d instantiate_decl(tree_node*, bool, bool)
???:0
0xd6a482 instantiate_pending_templates(int)
???:0
0xbeabf1 c_parse_final_cleanups()
???:0
0xe6ab08 c_common_parse_file()
???:0
```
To quickly reproduce:
https://godbolt.org/z/6envcsc66
