PyObjC assert error when running macOS app that uses pynput

I’m using Python 3.10.4 (from python.org) on macOS Monterey. I created a virtual environment with python -m venv env and activated it Then I installed:

pip install nuitka
pip install pynput

Here is what pip installed:

Package                              Version
------------------------------------ -------
Nuitka                               0.8.3
pip                                  22.0.4
pynput                               1.7.6
pyobjc-core                          8.5
pyobjc-framework-ApplicationServices 8.5
pyobjc-framework-Cocoa               8.5
pyobjc-framework-Quartz              8.5
setuptools                           58.1.0
six                                  1.16.0

I created main.py with this code:

import pynput

print("hello")

The program works and prints “hello”

Then I run this command:

python -m nuitka --follow-imports --standalone main.py --output-dir=publish

Output:

Nuitka-Options:INFO: Used command line options: --follow-imports --standalone main.py --output-dir=publish
Nuitka-Options:INFO: Following all imports is the default for standalone mode and need not be specified.
Nuitka:WARNING: Using very slow fallback for ordered sets, please install
Nuitka:WARNING: 'ordered-set' or 'orderset' PyPI packages for best Python
Nuitka:WARNING: compile time performance.
Nuitka:INFO: Starting Python compilation with Nuitka '0.8.3' on Python '3.10' commercial None.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'pynput.mouse' added 'pynput.mouse._darwin'.
Nuitka-Plugins:INFO: anti-bloat: Handling module 'pkg_resources' with 1 change(s) for: avoid using plistlib dependency on non-macOS.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'pkg_resources.extern' added 'pkg_resources._vendor.packaging,pkg_resources._vendor.pyparsing,pkg_resources._vendor.appdirs'.
Nuitka-Plugins:INFO: anti-bloat: Handling module 'pydoc' with 1 change(s) for: remove module ability to display GUI with tkinter and topics data.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'pkg_resources._vendor.packaging' added 'pkg_resources._vendor.packaging.version,pkg_resources._vendor.packaging.specifiers,pkg_resources._vendor.packaging.requirements'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'pynput.keyboard' added 'pynput.keyboard._darwin'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'zipfile' added 'py_compile'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'urllib.request' added 'http.client,http.cookiejar'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'socket' added '_socket'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'shelve' added 'dbm.dumb'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'pathlib' added 'ntpath,posixpath'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'importlib.metadata' added 'email'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'ctypes' added '_ctypes'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module '_asyncio' added 'asyncio'.
Nuitka-Plugins:INFO: implicit-imports: Implicit dependencies of module 'encodings' added 'encodings.idna,encodings.base64_codec,encodings.hex_codec,encodings.rot_13'.
Nuitka:INFO: Completed Python level compilation and optimization.               
Nuitka:INFO: Generating source code for C backend compiler.
Nuitka:INFO: Running data composer tool for optimal constant value handling.    
Nuitka:INFO: Running C compilation via Scons.
Nuitka-Scons:INFO: Backend C compiler: clang (clang).
Nuitka will make use of ccache to speed up repeated compilation.

Is it OK to download and put it in '/Users/hsc/Library/Application Support/Nuitka/ccache/v4.2.1'.

No installer needed, cached, one time question.

Proceed and download? [Yes]/No 
n
Nuitka-Scons:INFO: Slow C compilation detected, used 60s so far, scalability problem.
Nuitka-Scons:INFO: Running clang -o module.AppKit._metadata.o -c -std=c11 -fvisibility=hidden -fwrapv -pipe -w -fvisibility=hidden -fvisibility-inlines-hidden --target=x86_64-apple-macos10.9 -O3 -D_XOPEN_SOURCE -D__NUITKA_NO_ASSERT__ -D_NUITKA_STANDALONE -D_NUITKA_CONSTANTS_FROM_INCBIN -D_NUITKA_FROZEN=151 -D_NUITKA_EXE -I/Library/Frameworks/Python.framework/Versions/3.10/include/python3.10 -I. -I/Users/hsc/dev/globalhotkeys/env/lib/python3.10/site-packages/nuitka/build/include -I/Users/hsc/dev/globalhotkeys/env/lib/python3.10/site-packages/nuitka/build/static_src module.AppKit._metadata.c took 144.08 seconds
Nuitka-Scons:INFO: Backend linking program (no progress information available). 
Nuitka-Scons:WARNING: You are not using ccache.
Nuitka:INFO: Keeping build directory 'publish/main.build'.                      
Nuitka:INFO: Created binary that runs on macOS 10.9 (x86_64) or higher.
Nuitka:INFO: Successfully created 'publish/main.dist/main'.

The binary was created succesfully but when I run the programm, I get this error:

(env) globalhotkeys $ ./publish/main.dist/main 
Traceback (most recent call last):
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/main.py", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/pynput/__init__.py", line 40, in <module pynput>
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/pynput/keyboard/__init__.py", line 31, in <module pynput.keyboard>
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/pynput/_util/__init__.py", line 70, in backend
  File "importlib.py", line 126, in import_module
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/pynput/keyboard/_darwin.py", line 29, in <module pynput.keyboard._darwin>
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/Quartz/__init__.py", line 6, in <module Quartz>
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/AppKit/__init__.py", line 10, in <module AppKit>
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/Foundation/__init__.py", line 9, in <module Foundation>
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/CoreFoundation/__init__.py", line 13, in <module CoreFoundation>
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/objc/_lazyimport.py", line 152, in __init__
  File "/Users/hsc/dev/globalhotkeys/publish/main.dist/objc/_lazyimport.py", line 510, in __load_cftypes
objc.internal_error: PyObjC: internal error in PyObjCClass_UnbuildClass at Modules/objc/class-builder.m:104: assertion failed: objc_class != nil

I have never tried this with older versions of Nuitka so I do not know if this is a regression.

[Maxwell175]

This issue can be narrowed down to just pyobjc and the following reproducer:

import objc

v = objc.registerCFSignature('CFAllocatorRef', b'^{__CFAllocator=}', 2)
print(v)

[kayhayen]

@emre84 isn’t is clear that posting new issues below other issues is not getting accepted?