https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121089
Bug ID: 121089
Summary: internal compiler error: Segmentation fault
splay_tree_foreach since 13.1
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:
Program
```
#include <ostream>
enum class Mutation : auto
{
kSwap = 0,
};
std::ostream& operator<<(std::ostream& os, const Mutation& mutation)
{
switch (mutation) {
case Mutation::kSwap: return os << "kSwap";
};
}
```
Stack dump
```
<source>:10:3: internal compiler error: Segmentation fault
10 | };
| ^
0x2879ca5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x289b986 internal_error(char const*, ...)
???:0
0x29a7820 splay_tree_foreach
???:0
0xe56b88 c_switch_covers_all_cases_p(splay_tree_s*, tree_node*)
???:0
0xbc0ee3 pop_switch()
???:0
0xd9e180 finish_switch_stmt(tree_node*)
???:0
0xd20193 c_parse_file()
???:0
0xe8a449 c_common_parse_file()
???:0
```
To quickly reproduce:
https://godbolt.org/z/YecfzYMnh
