sys.exit() does not align with document described behavior since 3.13

[nukemiko]

Bug report

Bug description:

Passing any non-zero integer to sys.exit() causes Python to exit with exit code 1, regardless of the actual value of passed integer. This is inconsistent with the online documentation description, which does not describe or imply this behavior:

The optional argument arg can be an integer giving the exit status (defaulting to zero), or another type of object. If it is an integer, zero is considered “successful termination” and any nonzero value is considered “abnormal termination” by shells and the like.

Reproduced on Python 3.13.1 (provided by Arch Linux), Python 3.13.2 and 3.14.0a4 (both provided by astral-sh/python-build-standalone). Python 3.12 and lower has not affected.

CPython versions tested on:

3.13

Operating systems tested on:

Linux

[hugovk]

Cannot reproduce with Python 3.13.2 and Python 3.14.0a4 on macOS, installed using the official installer:

❯ python3.13 --version
Python 3.13.2

❯ python3.13 -c "import sys; sys.exit(123)"

❯ echo $?
123

❯ python3.14 --version
Python 3.14.0a4

❯ python3.14 -c "import sys; sys.exit(123)"

❯ echo $?
123

Nor with 3.13.0-3.13.2 using uv run 1.py when changing the version in:

# /// script
# requires-python = "==3.13.0"
# ///

import sys
print(sys.version)
sys.exit(123)

Nor with the same script with Ubuntu (via Docker) with 3.13.0-3.13.2 and 3.14.0a4.

[hugovk]

Or do you mean the REPL? I can reproduce it with the new REPL in 3.13:

❯ python3.12
Python 3.12.9 (v3.12.9:fdb81425a9a, Feb  4 2025, 12:21:36) [Clang 13.0.0 (clang-1300.0.29.30)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.exit(123)

❯ echo $?
123

❯ python3.13
Python 3.13.2 (v3.13.2:4f8bb3947cf, Feb  4 2025, 11:51:10) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.exit(123)

❯ echo $?
1

❯ PYTHON_BASIC_REPL=1 python3.13
Python 3.13.2 (v3.13.2:4f8bb3947cf, Feb  4 2025, 11:51:10) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.exit(123)

❯ echo $?
123

[picnixz]

Isn't it a duplicate of #129900?

[hugovk]

It is, thanks!

(I knew it looked familiar but couldn't find it when searching!)