New submission from Hartmut Goebel <>:

PyInstaller is a tool for freezing Python applications into stand-alone 
packages, much like py2exe. py2app, and bbfreeze. PyInstaller is providing 
*one* bootloader for all versions of Python supported (2.7, 3.4-3.6).

In PyInstaller the startup sequence is implemented in
pyi_pylib_start_python() in bootloader/src/pyi_pythonlib.c. The workflow 
roughly is:

- SetProgramName
- SetPythonHome
- Py_SetPath
- Setting runtime options
  - some flags using the global variables
  - PySys_AddWarnOption -> crash
- Py_Initialize
- PySys_SetPath

The crash occurs due to tstate (thread state) not being initialized when
calling PySys_AddWarnOption.

components: Interpreter Core
messages: 313546
nosy: htgoebel
priority: normal
severity: normal
status: open
title: New 3.7 startup sequence crashes PyInstaller
type: behavior
versions: Python 3.7

Python tracker <>
Python-bugs-list mailing list

Reply via email to