valid links reported as (connection failed) consistently

[stas00]

Any idea why these valid links fail to validate consistently?

linkcheck -e docs-dev.fast.ai/style.html

http://docs-dev.fast.ai/style.html
- (336:189) 'APL' => https://en.wikipedia.org/wiki/APL_(programming_language) (connection failed)
- (347:63) 'Iverson’s' => https://en.wikipedia.org/wiki/Kenneth_E._Iverson (connection failed)

running in debug mode I get:

Killing unresponsive Worker<0>
Done checking: https://en.wikipedia.org/wiki/APL_(programming_language) (connection failed) => 0 links
- BROKEN
Killing unresponsive Worker<2>
Done checking: https://en.wikipedia.org/wiki/Kenneth_E._Iverson (connection failed) => 0 links
- BROKEN

There is handful of other links to wikipedia on the same page and they all work. I double-checked manually that they work if I click on them.

Strangely there are 3 almost identical links:

https://en.wikipedia.org/wiki/APL_(programming_language)
https://en.wikipedia.org/wiki/J_(programming_language)
https://en.wikipedia.org/wiki/K_(programming_language)

and only the first out of 3 doesn't validate.

[stas00]

and now it looks like github pages blocked this user-agent/ip completely. So much for not letting user configure throttling. Now have to look for another throttle-friendly link checker :(

This is an awesome tool for checking your local pages. And proved to be a really bad choice if you're trying to validate something on a server that's configured to block agents that hit it too fast.

[filiph]

Should be fixed in 2.0.5.