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)
 
diff --git a/Misc/ACKS b/Misc/ACKS
index c888a8c..8117d80 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -453,6 +453,7 @@
 Fredrik Johansson
 Gregory K. Johnson
 Simon Johnston
+Matt Joiner
 Thomas Jollans
 Nicolas Joly
 Evan Jones