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Author: A5rocks

mypy/expandtype.py

@@ -129,7 +129,7 @@ def visit_param_spec(self, t: ParamSpecType) -> Type:
                 return Parameters(t.prefix.arg_types + repl.arg_types,
                                   t.prefix.arg_kinds + repl.arg_kinds,
                                   t.prefix.arg_names + repl.arg_names,
-                                  variables=t.prefix.variables + repl.variables)
+                                  variables=[*t.prefix.variables, *repl.variables])
         else:
             # TODO: should this branch be removed? better not to fail silently
             return repl

mypy/nodes.py

@@ -2676,7 +2676,7 @@ def add_type_vars(self) -> None:
             for vd in self.defn.type_vars:
                 if isinstance(vd, mypy.types.ParamSpecType):
                     self.has_param_spec_type = True
-                self.type_vars.append(vd.fullname)
+                self.type_vars.append(vd.name)
 
     @property
     def name(self) -> str:

mypy/types.py

@@ -1365,7 +1365,7 @@ def deserialize(cls, data: JsonDict) -> 'Parameters':
             [deserialize_type(t) for t in data['arg_types']],
             [ArgKind(x) for x in data['arg_kinds']],
             data['arg_names'],
-            variables=[deserialize_type(tv) for tv in data['variables']],
+            variables=[cast(TypeVarLikeType, deserialize_type(v)) for v in data['variables']],
         )
 
     def __hash__(self) -> int: