Gevent 20.12.0 give error: OverflowError: Python int too large to convert to C long

[theyosh]

• gevent version: pypi version 20.12.0
• Python version: Python 3.7.3 installed via deb packages.
• Operating System: Raspberry Pi OS (latest version) Linux 5.4.79-v7l+ Build and test with PyPy 7.1 #1373 SMP Mon Nov 23 13:27:40 GMT 2020 armv7l GNU/Linux
• Device: Raspberry PI version 4

Description:

Upgrading from gevent 20.9.0 to 20.12.0 with pip install -U command will break my python software. It will give the following error when we monkey patch python. This is on a Raspberry PI 4:

OverflowError: Python int too large to convert to C long

Traceback (most recent call last):
  File "terrariumPI.py", line 5, in <module>
    monkey.patch_all()
  File "/home/pi/TerrariumPI/venv/lib/python3.7/site-packages/gevent/monkey.py", line 1222, in patch_all
    patch_thread(Event=Event, _warnings=_warnings)
  File "/home/pi/TerrariumPI/venv/lib/python3.7/site-packages/gevent/monkey.py", line 195, in ignores
    return func(*args, **kwargs)
  File "/home/pi/TerrariumPI/venv/lib/python3.7/site-packages/gevent/monkey.py", line 756, in patch_thread
    _notify_did_subscribers=False)
  File "/home/pi/TerrariumPI/venv/lib/python3.7/site-packages/gevent/monkey.py", line 443, in _patch_module
    gevent_module, target_module, target_module_name = _check_availability(name)
  File "/home/pi/TerrariumPI/venv/lib/python3.7/site-packages/gevent/monkey.py", line 429, in _check_availability
    gevent_module = getattr(__import__('gevent.' + name), name)
  File "<frozen importlib._bootstrap>", line 980, in _find_and_load
  File "<frozen importlib._bootstrap>", line 149, in __enter__
  File "<frozen importlib._bootstrap>", line 88, in acquire
  File "src/gevent/_semaphore.py", line 273, in gevent._gevent_c_semaphore.Semaphore.__enter__
  File "src/gevent/_semaphore.py", line 274, in gevent._gevent_c_semaphore.Semaphore.__enter__
  File "src/gevent/_semaphore.py", line 175, in gevent._gevent_c_semaphore.Semaphore.acquire
  File "/home/pi/TerrariumPI/venv/lib/python3.7/site-packages/gevent/thread.py", line 121, in acquire
    acquired = BoundedSemaphore.acquire(self, blocking, timeout)
  File "src/gevent/_semaphore.py", line 175, in gevent._gevent_c_semaphore.Semaphore.acquire
  File "src/gevent/_semaphore.py", line 200, in gevent._gevent_c_semaphore.Semaphore.acquire
OverflowError: Python int too large to convert to C long

On a Raspberry Pi 3 there is no overflow error, but the camera is not working. When I try to grab an frame(image) from the Raspberry PI camera, it times out with a general message that the camera was not able to. Sorry no error message from it.

What I've run:

In just a python console:

from gevent import monkey
monkey.patch_all()

I would just expect that an upgrade will not break my code. Also, when just running monkey.patch_all() it will break already. Should not be happening.

[theyosh]

Is this related to 32bit vs 64bit OS?

[jamadden]

This is due to thread.get_ident() returning a long in Python 2, and an unsigned long in Python 3. The gevent code currently uses a long; I haven't encountered a Python 3 system that actually returned a thread identifier greater than 2**63 (or 2**31, depending). But apparently your system does. I'll have to figure out how to conditionally change the type in gevent's Cython code.

[theyosh]

Is there something I can do/test to get more info?

[jamadden]

Thank you, no. The problem is clear.

[jamadden]

Fix released in 20.12.1.

[theyosh]

Nice, that was fast. It is working. Thanks