Temp fix

Author: cdce8p

mypy/typeanal.py

@@ -1717,9 +1717,10 @@ def fix_instance(
         env[tv.id] = arg
     t.args = tuple(args)
     fix_type_var_tuple_argument(t)
-    fixed = expand_type(t, env)
-    assert isinstance(fixed, Instance)
-    t.args = fixed.args
+    if not t.type.has_type_var_tuple_type:
+        fixed = expand_type(t, env)
+        assert isinstance(fixed, Instance)
+        t.args = fixed.args
 
     min_tv_count = sum(tv.has_default() is False for tv in t.type.defn.type_vars)
     if arg_count != 0 and not (min_tv_count <= arg_count <= max_tv_count):