fix: name error ReferenceError

Author: BobTheBuidler

mypyc/test-data/run-weakref.test

@@ -62,6 +62,7 @@ def test_weakref_proxy():
     with pytest.raises(ReferenceError):
         p.some_meth()
 
+[builtins fixtures/exception.pyi]
 [file driver.py]
 from native import test_weakref_proxy
 
@@ -88,6 +89,7 @@ def test_weakref_proxy_with_callback():
     with pytest.raises(ReferenceError):
         p.some_meth()
 
+[builtins fixtures/exception.pyi]
 [file driver.py]
 from native import test_weakref_proxy_with_callback
 

test-data/unit/fixtures/exception.pyi

@@ -22,6 +22,7 @@ class BaseException:
 class Exception(BaseException): pass
 class RuntimeError(Exception): pass
 class NotImplementedError(RuntimeError): pass
+class ReferenceError(Exception): ...
 
 if sys.version_info >= (3, 11):
     _BT_co = TypeVar("_BT_co", bound=BaseException, covariant=True)