Note the `AsyncResponseHandler` suffers from the same issue when used like this:
```
f = client.File()
handler = AsyncResponseHandler()
status = f.open(smallfile, OpenFlags.READ, callback=handler)
status, response, hostlist = handler.wait()
```
This is because the callback is defined as:
```
def __call__(self, status, response, hostlist):
self.status = status
self.response = response
self.hostlist = hostlist
self.mutex.release()
```
The file above may be closed in the main process any time after `mutex.release()` is called; however, the callback will still need to hold the GIL to exit the function. It would be quite hard to trigger in this case, however.
---
Reply to this email directly or view it on GitHub:
https://github.com/xrootd/xrootd-python/issues/13#issuecomment-170359850
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