inconsistent behavior around ignored files within ignore crate

[drainpixie]

Automatic releases seem to be broken for a month or so, due to failure of the ignores_gitignore_file function.

[aslilac]

yeah, I noticed that. :\ and I've observed the behavior in normal day-to-day usage as well. since the tree walking is entirely outsourced to the ignore, I have a feeling it's a bug on their end, but I haven't gotten to the root cause yet.

making it worse, the test consistently passes on my machine. I've run it hundreds of times trying to hunt down the circumstances behind the bug, and found nothing.