message: Turn off tracing after execution finishes
  * This means the tracing isn't still lingering around when we shutdown
  and the context is destroyed.
diff: @@ -518,6 +518,8 @@ void PythonContext::executeString(const QString &filename, const QString &source
  // catch any output
  outputTick();
  + PyEval_SetTrace(NULL, NULL);
  +
  Py_XDECREF(thisobj);
  Py_XDECREF(traceContext);
  }
  