Merge pull request #4822 from abergeron/fix_debugmode

theano/compile/debugmode.py

@@ -147,7 +147,7 @@ class BadThunkOutput(DebugModeError):
         print("  thunk2  :", self.thunk2, file=sio)
 
         # Don't import it at the top of the file to prevent circular import.
-        utt = theano.tests.unittest_tools
+        import theano.tests.unittest_tools as utt
         print(utt.str_diagnostic(self.val1, self.val2, None, None), file=sio)
         ret = sio.getvalue()
         return ret