Hacky workaround python bug - daemon threads continue to run after

threading module has been destroyed.

fsl/utils/status.py

@@ -150,14 +150,25 @@ class ClearThread(threading.Thread):
         (via a call to :func:`clearStatus`).
         """
 
-        while True:
+        # http://bugs.python.org/issue14623
+        #
+        # When the main thread exits, daemon threads will
+        # continue to run after the threading module is
+        # destroyed. Calls to the Event methods can thus
+        # result in errors.
+        try:
 
-            self.__vetoEvent .clear()
-            self.__clearEvent.wait()
-            self.__clearEvent.clear()
+            while True:
 
-            if not self.__clearEvent.wait(self.__timeout) and \
-               not self.__vetoEvent.isSet():
-                
-                log.debug('Timeout - clearing status')
-                clearStatus()
+                self.__vetoEvent .clear()
+                self.__clearEvent.wait()
+                self.__clearEvent.clear()
+
+                if not self.__clearEvent.wait(self.__timeout) and \
+                   not self.__vetoEvent.isSet():
+
+                    log.debug('Timeout - clearing status')
+                    clearStatus()
+
+        except:
+            pass