Partial download crashes with regex parse error

[5long]

Partial download crashes with regex parse error

[blyxxyz]

Oh, this one's nasty. We do have a test for this feature, but test builds include the assert_cmd dependency, which includes the predicates dependency, which enables the unicode-perl feature for regex, "fixing" the problem.

Two more things went wrong:

• Using \d instead of [0-9]
• Given that we did use \d, disabling the default features for regex

I wonder if we could use non-test builds for the end-to-end tests. But this feature only has a unit test, so it wouldn't have helped here. And missing features should mostly cause problems at compile time, not runtime, regex is a special case.

#333 was a similar case. We should comb through our list of dependencies to look for other features we do use but don't declare.

[ducaale]

This is now fixed in xh v0.21.0