RuntimeError: cannot use from_handle() on NULL pointer

[2161478]

• gevent version: 21.1.2 from pypi
• Python version: 3.9 downloaded from python.org
• Operating System: Windows 10 64 Bit Build 19042.1052

Description:

I was doing some requests then have encountered this issue: RuntimeError: cannot user from_handle() on NULL pointer WARNING: gevent: Unhandled error with no watcher

I only get this from time to time so I have a hard time replicating it.

File: "gevent\libuv\loop.ppy", line 46, in python_queue_callback

 def python_queue_callback(self, watcher_ptr, revents):
        watcher_handle = watcher_ptr.data
        the_watcher = self.from_handle(watcher_handle)

        the_watcher.loop._queue_callback(watcher_ptr, revents)

[GitHubAtomicMan]

same problem, how to fix it???

[jacwalte]

same problem

cannot seem to track it down

Also, perhaps a different issue, but whatever gevent is doing, is also causing my VSCode debugger to fail with pytest and unittest

It seems that the gevent monkey-patching is being used. Please set an environment variable with: GEVENT_SUPPORT=True to enable gevent support in the debugger.

I have tried patching and setting the "gevent": true in launch.json as well

[jacwalte]

Figured out the second issue - but still having the first

This is very random so I believe it is a racing issue. but some assistance would be helpful :)