[BUG]: Disappearing return value

[suixin1424]

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What version (or hash if on master) of pybind11 are you using?

v2.13

Problem description

i define a method in a class and it works well when it's content is below: but, as long as i add this line, it break and return nothing not even None type: i troubleshoot the problem as follow, and it successfully print the number 0:

Reproducible example code

No response

Is this a regression? Put the last known working version here if it is.

Not a regression