https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107938
Bug ID: 107938
Summary: ICE directly returning `this` of `extern` variable in
template
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: johelegp at gmail dot com
CC: johelegp at gmail dot com
Target Milestone: ---
See https://compiler-explorer.com/z/4d1esaber.
```C++
struct Q {
int n;
constexpr const Q* operator()(auto) const { return this; }
};
extern const Q q;
template<int>
constexpr const Q* p = q(0);
```
```
<source>:9:27: internal compiler error: Segmentation fault
9 | constexpr const Q* p = q(0);
| ^
0x22e3a9e internal_error(char const*, ...)
???:0
0xce2006 convert_for_initialization(tree_node*, tree_node*, tree_node*, int,
impl_conv_rhs, tree_node*, int, int)
???:0
0xced3f0 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
???:0
0xb22845 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
???:0
0xc20997 c_parse_file()
???:0
0xd5b949 c_common_parse_file()
???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
```
Being less direct works: https://compiler-explorer.com/z/jn99aG36e.
