"ImportError: sys.meta_path is None, Python is likely shutting down" on exit when built as a Python module #82675

New Issue

Tyler Alden Gubala · 2020-11-13T00:30:40+01:00

2020-11-13 00:30:40 +01:00

System Information
Operating system: MacOS
Graphics card: Intel Integrated

Blender Version
Broken: 2.91

Short Description of the Problem
When built as a Python module, on exiting the Python process you will get the following error:

ImportError: sys.meta_path is None, Python is likely shutting down
Error: Unknown py-exception, could not convert
zsh: segmentation fault  python3

Exact steps for others to reproduce the error

Get Python 3.7.9 from Python.org (not brew)
mkdir bpy-test
cd bpy-test
curl -L https://github.com/TylerGubala/blenderpy/releases/download/v2.91a0/bpy-2.91a0-cp37-cp37m-macosx_10_13_x86_64.whl
python3 -m venv venv
source venv/bin/activate
python3 -m pip install -U pip setuptools wheel
python3 -m pip install bpy-2.91a0-cp37-cp37m-macosx_10_13_x86_64.whl && bpy_post_install
python3 -c 'import bpy;bpy.ops.render.render(write_still=True)'

See: https://github.com/TylerGubala/blenderpy/issues/60
See also: https://devtalk.blender.org/t/bpy-obscure-error-during-python-exit-on-macos/16102

**System Information** Operating system: MacOS Graphics card: Intel Integrated **Blender Version** Broken: 2.91 **Short Description of the Problem** When built as a Python module, on exiting the Python process you will get the following error: ``` ImportError: sys.meta_path is None, Python is likely shutting down Error: Unknown py-exception, could not convert zsh: segmentation fault python3 ``` **Exact steps for others to reproduce the error** 1. Get [Python 3.7.9 from Python.org](https://www.python.org/ftp/python/3.7.9/python-3.7.9-macosx10.9.pkg) (**not** `brew`) 2. `mkdir bpy-test` 3. `cd bpy-test` 4. `curl -L https://github.com/TylerGubala/blenderpy/releases/download/v2.91a0/bpy-2.91a0-cp37-cp37m-macosx_10_13_x86_64.whl` 5. `python3 -m venv venv` 6. `source venv/bin/activate` 7. `python3 -m pip install -U pip setuptools wheel` 8. `python3 -m pip install bpy-2.91a0-cp37-cp37m-macosx_10_13_x86_64.whl && bpy_post_install` 9. `python3 -c 'import bpy;bpy.ops.render.render(write_still=True)'` See: https://github.com/TylerGubala/blenderpy/issues/60 See also: https://devtalk.blender.org/t/bpy-obscure-error-during-python-exit-on-macos/16102

Tyler Alden Gubala commented

2020-11-13 00:30:40 +01:00

Added subscriber: @TylerGubala

Mateusz Grzeliński commented

2020-11-13 08:51:18 +01:00

Added subscriber: @grzelins

Mateusz Grzeliński commented

2020-11-13 09:04:15 +01:00

I can confirm this problem on current (13.11) master (4efd87d56b65e4fb5c10de399ab15ef59a9c305f)

Platform: windows: ** Visual Studio 2019 Developer Command Prompt v16.7.6

make update
make bpy
# copy bpy to python site packages and so on

C:\Users\mat-lp\Documents\blender-src\blender>python
Python 3.7.7 (tags/v3.7.7:d7c567b08f, Mar 10 2020, 10:41:24) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import bpy
>>> bpy.app.version_string

'2.92.0 Alpha'

>>> exit()

ImportError: sys.meta_path is None, Python is likely shutting down
Error: Unknown py-exception, could not convert

This error also causes debugging traps to fail in pycharm.

btw. I just noticed that operators bpy.ops.wm.url_open_preset(type='BUG') and bpy.ops.wm.sysinfo() does not work in this setup (fail with python traceback)...

I can confirm this problem on current (13.11) master (`4efd87d56b65e4fb5c10de399ab15ef59a9c305f`) Platform: **windows**: `** Visual Studio 2019 Developer Command Prompt v16.7.6` ``` make update make bpy # copy bpy to python site packages and so on C:\Users\mat-lp\Documents\blender-src\blender>python Python 3.7.7 (tags/v3.7.7:d7c567b08f, Mar 10 2020, 10:41:24) [MSC v.1900 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import bpy >>> bpy.app.version_string '2.92.0 Alpha' >>> exit() ImportError: sys.meta_path is None, Python is likely shutting down Error: Unknown py-exception, could not convert ``` This error also causes debugging traps to fail in pycharm. btw. I just noticed that operators `bpy.ops.wm.url_open_preset(type='BUG')` and `bpy.ops.wm.sysinfo()` does not work in this setup (fail with python traceback)...

Robert Guetzkow commented

2020-11-13 11:15:40 +01:00

Added subscriber: @rjg

Robert Guetzkow commented

2020-11-13 11:15:40 +01:00

In my recent build of bpy, I can reproduce this error message when calling exit(). I'll have to check where this is coming from.

In my recent build of bpy, I can reproduce this error message when calling `exit()`. I'll have to check where this is coming from.

Robert Guetzkow commented

2020-11-13 11:44:45 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Robert Guetzkow commented

2020-11-13 11:44:45 +01:00

Do you know which most recent version worked properly?

Robert Guetzkow commented

2020-11-13 11:55:57 +01:00

Changed status from 'Needs User Info' to: 'Confirmed'

Robert Guetzkow commented

2020-11-13 11:55:57 +01:00

Known good commit is fd5d014b62, will try to bisect.

Known good commit is fd5d014b62, will try to bisect.

Robert Guetzkow commented

2020-11-13 16:20:17 +01:00

Added subscriber: @ideasman42

Robert Guetzkow commented

2020-11-13 16:20:17 +01:00

This was issue was introduced in commit fa566157a5 where the Python modules are unregistered on exit (CC @ideasman42).

This was issue was introduced in commit fa566157a5 where the Python modules are unregistered on exit (CC @ideasman42).

Thomas Beck commented

2020-11-24 21:14:56 +01:00

Added subscriber: @plasmasolutions

Carolina Aiazzi commented

2020-12-20 22:35:44 +01:00

Added subscriber: @Cora-Lina

Carolina Aiazzi commented

2020-12-20 22:35:44 +01:00

A quick workaround is to go inside ./blender/source/blender/windowmanager/intern and the edit wm_init_exit.c , and comment the line BPY_run_string_eval(C, (const char *- [ ]){"addon_utils", NULL}, "addon_utils.disable_all()");

Campbell Barton commented

2021-01-07 03:37:44 +01:00

Changed status from 'Confirmed' to: 'Needs User Info'

Campbell Barton commented

2021-01-07 03:37:44 +01:00

While I can't redo this error, I ran into a different error which might have caused this bug too f35a38fba7.

Could you check if this fixes the problem?

While I can't redo this error, I ran into a different error which might have caused this bug too f35a38fba7. Could you check if this fixes the problem?

Robert Guetzkow commented

2021-01-13 14:34:47 +01:00

The problem is not fixed, the same error still occurs.