https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91023
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The current ICE is:
```
t.cc:10:11: internal compiler error: tree check: expected type_argument_pack or
nontype_argument_pack, have record_type in unify_pack_expansion, at
cp/pt.cc:23947
0x979320 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree.cc:8951
0x81b71f tree_check2(tree_node*, char const*, int, char const*, tree_code,
tree_code)
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree.h:3621
0x81b71f unify_pack_expansion
/home/apinski/src/upstream-gcc-git/gcc/gcc/cp/pt.cc:23947
```
