inspect.stack() causes error on Python 3.10

[lucidfrontier45]

Description

OS: Ubuntu 20.04 Python: 3.10.4 PyArmor: 7.4.2

1. create a venv and install pyarmor

python3.10 -m venv venv
venv/bin/pip install pyarmor

2. Prepare a python file (main.py) as follows

import inspect
inspect.stack()

3. Obfuscate main.py

venv/bin/pyarmor obfuscate main.py
>>>
INFO     PyArmor Trial Version 7.4.2
INFO     Python 3.10.4
INFO     Target platforms: Native
INFO     Source path is "/home/du/workspace/pyarmor_test"
INFO     Entry scripts are ['main.py']
INFO     Use cached capsule /home/du/.pyarmor/.pyarmor_capsule.zip
INFO     Search scripts mode: Normal
INFO     Save obfuscated scripts to "dist"
INFO     Read product key from capsule
INFO     Obfuscate module mode is 2
INFO     Obfuscate code mode is 1
INFO     Wrap mode is 1
INFO     Restrict mode is 1
INFO     Advanced value is 0
INFO     Super mode is False
INFO     Super plus mode is not enabled
INFO     Generating runtime files to dist/pytransform
INFO     Extract pytransform.key
INFO     Read default license from capsule
INFO     Copying /home/du/workspace/pyarmor_test/venv/lib/python3.10/site-packages/pyarmor/platforms/linux/x86_64/_pytransform.so
INFO     Patch library dist/pytransform/_pytransform.so
INFO     Patch library file OK
INFO     Copying /home/du/workspace/pyarmor_test/venv/lib/python3.10/site-packages/pyarmor/pytransform.py
INFO     Rename it to pytransform/__init__.py
INFO     Generate runtime files OK
INFO     Start obfuscating the scripts...
INFO     	main.py -> dist/main.py
INFO     Insert bootstrap code to entry script dist/main.py
INFO     Obfuscate 1 scripts OK.

4. Run obfuscated script and get error

venv/bin/python dist/main.py 
>>>
Traceback (most recent call last):
  File "</home/du/workspace/pyarmor_test/dist/main.py>", line 3, in <module>
  File "<frozen main>", line -1, in <module>
  File "/usr/local/lib/python3.10/inspect.py", line 1678, in stack
    return getouterframes(sys._getframe(1), context)
  File "/usr/local/lib/python3.10/inspect.py", line 1655, in getouterframes
    frameinfo = (frame,) + getframeinfo(frame, context)
  File "/usr/local/lib/python3.10/inspect.py", line 1627, in getframeinfo
    start = lineno - 1 - context//2
TypeError: unsupported operand type(s) for -: 'NoneType' and 'int'

Note that this error does not occurs when I use Python 3.9.x .

[jondy]

For inspect.stack and any function to visit python runtime frame, the obfuscated scripts could not make sure it works. Though it works in some python version, it may not work in other versions. I'll not fix this kind of issue.

[ran404]

A number of things break due to lineno not being made available. Would it be possible to have Pyarmor simply return a dummy value, like -1? Then there is a higher chance that thing might not completely blow up when some third party code calls inspect.*, which is outside of our control.

I've been hit by this problem on a number of occasions already. One is coming from pandas' deprecation warnings (it tries to be friendly by showing you which line the offending code is), when it does, my app just bombs out. The other problem is with pytest - if any of the code calls logging.exception(...), then pytest simply blows up, which is unfortunately because I'm really keen to unit test my post-obfuscated code to make sure things actually work..

[jondy]

It seems Pyarmor 8.0 could work with this example. I just test with Python 3.10 with this main.py

pyarmor gen main.py
python3.10 dist/main.py