Fixed

Haskell version does not indicate the input:

expected: []
but got: [1,2,3,4,5,6,7,8,9]

What was the input?

The author of this kata, lunitik, needs to implement the fix.
He hasn't been active in over a year.
I want to contact him, but I don't know how to message users on this site...

Same here. The random test fails with the undecypherable:

Falsifiable (after 4 tests and 6 shrinks): expected: Just 0 but got: Nothing "a" Positive {getPositive = 1} -1

What am I supposed to do with that? ...

I don't know how many months has passed, but the problem with Haskell stills. Can anybody do something?

Some 9 months later, nothing happened.

I also have problems with the haskell tests:

pageIndex
should work for some collections and ipp values
Test Passed
should reject invalid indices
Test Passed
should work for random collections and ipp values
Falsifiable (after 2 tests and 1 shrink): 
expected: Just 0
 but got: Nothing
[0]
Positive {getPositive = 1}
-1```

I's possible to do it faster than O(n) if by that you mean trying every possible value for x (or y). The key is making use of the hint in the description...

same here ....

Likewise

I have the same issue. Please fix it :)

When will this issue be fixed for Haskell :( :(

Still not fixed...

Please which language? I didn't think the test cases were updated.

I don't know if the test cases were updated since your comment, but I found this kata quite hard for a 5 kyu.
My first solution was in O(n²) and didn't pass, granted. But when my second attempt in O(n) didn't pass either, it took me a while to find a working solution.
I would rate this 4 kyu.