FontConfiguration object has no attribute _folder

[LukasKlement]

With version 61.2 I'm frequently getting this exception:

Exception ignored in: <function FontConfiguration.del at 0x7ff94e0745e0>
Traceback (most recent call last):
File "/home/igeltech/.virtualenvs/renderenv/lib/python3.9/site-packages/weasyprint/text/fonts.py", line 258, in del
rmtree(self._folder, ignore_errors=True)
AttributeError: 'FontConfiguration' object has no attribute '_folder'

I do not know how to reproduce it, it appears randomly.

[liZe]

Thanks for the bug report.

I get this error too when I launch tests. It’s strange:

WeasyPrint/weasyprint/text/fonts.py

Lines 259 to 261 in 245e4f5

	def __del__(self):
	"""Clean a font configuration for a document."""
	rmtree(self._folder, ignore_errors=True)

As self._folder is created when the object is initialized, I don’t see how it could not be present…

[liZe]

This bug can happen when a FontConfiguration object is destroyed before its initialization is finished. It can for example happen when tests are launched in parallel: when one test fails, other processes are stopped, maybe at this wrong place.

Your use case is probably different, but the fix should work for you too.