https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121088
Bug ID: 121088
Summary: internal compiler error: Segmentation fault
finish_static_data_member_decl since 12.1
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 maybe related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121085:
Program:
```
template <class T>
struct PointerMutator1
{
template <class U>
static
auto TestMemberAccess(U*) -> decltype(
(static_cast<T*>(0))->operator=(42)
);
static const auto Value = decltype(TestMemberAccess<int>(0))::value;
};
int main() {
PointerMutator1<int>::Value
}
```
Stack dump
```
<source>:10:65: internal compiler error: Segmentation fault
10 | static const auto Value =
decltype(TestMemberAccess<int>(0))::value;
| ~~~~~~~~~~~~~~~~~~~~~^~~
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
0xd556bd tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd782d9 instantiate_decl(tree_node*, bool, bool)
???:0
0xbf3387 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int,
cp_decomp*)
???:0
0xc03be3 finish_static_data_member_decl(tree_node*, tree_node*, bool,
tree_node*, int)
???:0
0xd845d8 instantiate_class_template(tree_node*)
???:0
0xd20193 c_parse_file()
???:0
0xe8a449 c_common_parse_file()
???:0
```
To quickly reproduce:
https://godbolt.org/z/rzq3Eqnrr
