Issue #13894: Skip test_threading.CRLockTests if _CRLock isn't available. Patch
by Matt Joiner.
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index ef15d10..924d9d3 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -726,6 +726,7 @@
class PyRLockTests(lock_tests.RLockTests):
locktype = staticmethod(threading._PyRLock)
+@unittest.skipIf(threading._CRLock is None, 'RLock not implemented in C')
class CRLockTests(lock_tests.RLockTests):
locktype = staticmethod(threading._CRLock)