Problem with --exclude-from flag

[ivandeex (Ivan Andreev)]

Actually it's a bug in rclone, discovered just recently - the filtering rules should be glob-based but leaked some regexp-patterns into pattern matcher.
See:

Rclone copy using regex expression using include multiple expression for file name

That is a very interesting answer and shouldn't work at all because rclone filter strings are file globs not regexps. However it does work... I think the reason it works is actually a bug. Rclone translates the filters into regular expressions (you can see them with -vv --dump filters), but it is dumping the \d straight into the regexp which it shouldn't be - it should be escaping the \.. This means that any of the regexp \ chars will work in the glob which wasn't unintended certainly! So I…

By 1.58 we hope to settle the syntax by explicitly isolating glob and regexp parts in filter rules, transforming the bug into documented feature.

For now you might mitigate it by \-escaping. You are welcome to report your findings in the ongoing task:

filter: add `{{ regexp }}` syntax to pattern matches - fixes #4074