Index: Lib/test/test_threading.py
===================================================================
--- Lib/test/test_threading.py	(wersja 88673)
+++ Lib/test/test_threading.py	(kopia robocza)
@@ -684,6 +684,10 @@
         thread = threading.Thread()
         thread.start()
         self.assertRaises(RuntimeError, setattr, thread, "daemon", True)
+        
+    def test_releasing_lock(self):
+        lock = threading.Lock()
+        self.assertRaises(RuntimeError, lock.release)
 
 
 class LockTests(lock_tests.LockTests):
Index: Modules/_threadmodule.c
===================================================================
--- Modules/_threadmodule.c	(wersja 88673)
+++ Modules/_threadmodule.c	(kopia robocza)
@@ -1308,7 +1308,9 @@
 
     /* Add a symbolic constant */
     d = PyModule_GetDict(m);
-    ThreadError = PyErr_NewException("_thread.error", NULL, NULL);
+    ThreadError = PyExc_RuntimeError;
+    Py_INCREF(ThreadError);
+    
     PyDict_SetItemString(d, "error", ThreadError);
     Locktype.tp_doc = lock_doc;
     Py_INCREF(&Locktype);