Fix B008 edge case with lambda functions

[jpy-git]

Closes #242

In #239 I introduced the ability to detect functions at any depth of function default args to prevent things like:

def foo(a=[datetime.now()], b=bar(datetime.now())): ...

One thing I overlooked was lambda functions which are slightly different given that their contents act as function body and are therefore only evaluated when the lambda function is called, therefore B008 doesn't apply to these.

from datetime import datetime
import time

def foo(f=lambda x: datetime.now()):
    print(f(1))
    time.sleep(5)
    print(f(1))

foo()

prints

2022-03-25 11:36:22.999143
2022-03-25 11:36:28.004194

Fix is pretty simple, don't check inside lambda functions.

[cooperlees]

Wonder why CI didn't run here? That is very strange ...

[jpy-git]

@cooperlees Strange, I've found that closing and reopening a PR seems to fix these things 😅

[cooperlees]

And it did. Wonder where we can log the bug?

[cooperlees]

Makes sense to me. Thanks!

[jpy-git]

And it did. Wonder where we can log the bug?

Maybe a GitHub bug report: https://support.github.com/contact/bug-report

Although tbh I've only ever had it happen once before and closing/reopening or pushing another commit seems to re-trigger things so not too big an issue 😄