Compilation fails when cache directory exists (sometimes)

[agross]

Nanoc compilation sometimes fails unless you rm -rf tmp.

Expected behavior

Compilation succeeds.

Actual behavior

Compilation fails.

Details

The item reported in the log below is passed-through, no filters and such. Note the path pointing to a temporary file.

Crash log

https://gist.github.com/agross/9831ab6eb3844783424b19f64bd7831c

[denisdefreyne]

I’m unsure how to reproduce this. Can you try whether the issue also exists on master, and if so, could you provide a reproduction (a small one is preferred, but not required).

[agross]

I'll try to. I think I can reproduce it locally pretty reliably, but the project is rather complex.

[sunshineco]

This failure looks remarkably similar to the failure mentioned tangentially in #1082. I came up with a reproduction recipe, but it only manifested when some in-progress patches from Denis were applied. However, if the underlying cause is the same, perhaps those patches and the recipe I provided could help track down the problem (assuming it still manifests on master).

[denisdefreyne]

Any reproductions that work with master would be incredibly valuable!

I know that @gpakosz is also experiencing this issue.

[denisdefreyne]

I have a reproduction case!

[denisdefreyne]

A (WIP) fix is in #1109.

[agross]

Works for me! Many thanks!