Segmentation fault on my overloaded decorator

[t184256]

Bug Report

With mypy 1.6.0, I get a segmentation fault when typechecking a decorator, overloaded to work with and without parameters. I'm not getting any INTERNAL ERROR or tracebacks, thus not filing this as "Crash Report". This was not the case with mypy 1.4.0 and mypy 1.5.1.

To Reproduce

Code example: GitHub link or, alternatively attachment

Crash example: GitHub actions log or, alternatively, mypy.crash.log

Local environment exhibiting the same crash:

$ python3 --version; rpm -q python3
Python 3.11.6
python3-3.11.6-1.fc38.x86_64
$ /usr/bin/virtualenv venv && venv/bin/python -m pip install mypy
created virtual environment CPython3.11.6.final.0-64 in 95ms
...
Successfully installed mypy-1.6.0 mypy-extensions-1.0.0 typing-extensions-4.8.0

Actual Behavior

$ venv/bin/python -m mypy decorator.py
Segmentation fault (core dumped)

Your Environment

• Mypy version used: 1.6.0
• Mypy command-line flags: none; --tb
• Mypy configuration options from mypy.ini (and other config files): none
• Python version used: 3.11.6 / python3-3.11.6-1.fc38.x86_64

[AlexWaygood]

I can reproduce the crash with mypy 1.6, but it seems it's already fixed on the mypy master branch. It's almost certainly a duplicate of #16245, which was also a new-in-1.6 segfault involving ParamSpec and overloads that caused mypy to exit without any traceback

[t184256]

Looks like it! mypy-1.7.0+dev.4a9e6e60884c0bab89eb2ec6e947373c871f8aee has indeed succeeded without a crash. Thank you for a prompt response.