Fix copytype

Author: cdce8p

mypy/copytype.py

@@ -81,7 +81,9 @@ def visit_type_var(self, t: TypeVarType) -> ProperType:
         return self.copy_common(t, dup)
 
     def visit_param_spec(self, t: ParamSpecType) -> ProperType:
-        dup = ParamSpecType(t.name, t.fullname, t.id, t.flavor, t.upper_bound, prefix=t.prefix)
+        dup = ParamSpecType(
+            t.name, t.fullname, t.id, t.flavor, t.upper_bound, t.default, prefix=t.prefix
+        )
         return self.copy_common(t, dup)
 
     def visit_parameters(self, t: Parameters) -> ProperType:
@@ -95,7 +97,9 @@ def visit_parameters(self, t: Parameters) -> ProperType:
         return self.copy_common(t, dup)
 
     def visit_type_var_tuple(self, t: TypeVarTupleType) -> ProperType:
-        dup = TypeVarTupleType(t.name, t.fullname, t.id, t.upper_bound, t.tuple_fallback)
+        dup = TypeVarTupleType(
+            t.name, t.fullname, t.id, t.upper_bound, t.tuple_fallback, t.default
+        )
         return self.copy_common(t, dup)
 
     def visit_unpack_type(self, t: UnpackType) -> ProperType: