Improperly punycoded hostname for hostname-anchored filters with Unicode characters

[gorhill]

Describe the issue

The filter ||atđhe.net/pu/ (and other similar hostname-anchored filters with Unicode characters) is improperly punycoded by uBO at compile time. The filter is currently erroneously compiled to:

||undefinedxn--athe-1ua.net/pu/

Instead of:

||xn--athe-1ua.net/pu/

Occurrences of such improperly parsed filters:

• EasyList: 3
• CHN: EasyList China: 0
• DEU: EasyList Germany: 4
• FRA: EasyList Liste FR: 2
• RUS: RU AdList: 14

Not too bad but still, this needs to be fixed for next release.

Steps for anyone to reproduce the issue

I just use dev tools to step into the code, breakpoint at

uBlock/src/js/static-net-filtering.js

Line 1449 in 51ade9f

s = matches[1] + punycode.toASCII(matches[2]) + matches[3];

, which will be triggered when pasting ||atđhe.net/pu/ in My filters.