https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120875
Bug ID: 120875
Summary: internal compiler error: in unify, at cp/pt.cc:25494
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:
```
template <typename T, T...>
struct bar;
template <int... Xs, typename T>
struct bar<T, Xs...> {};
```
Stack dump:
```
<source>:4:8: internal compiler error: in unify, at cp/pt.cc:25494
4 | struct bar<T, Xs...> {};
| ^~~~~~~~~~~~~
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
0xd73097 maybe_process_partial_specialization(tree_node*)
???:0
0xd166e3 c_parse_file()
???:0
0xe7e469 c_common_parse_file()
???:0
```
To quickly reproduce:
https://godbolt.org/z/Ks818d19M
