Slice syntax doesn't work immediately following a function
I think this is actually related to #868 and probably explains it.
If you have a method that should generate an array and then immediately follow it by a slice pattern, then the slice pattern isn't generated, whereas if you surround the method by [], then it works as intended.
tommoa:~# let multiline = "one
two
three
four"
tommoa:~# for line in @lines($multiline)[..2]
echo $line
end
one
two
three
four
tommoa:~# let second = @lines($multiline)[..2]
tommoa:~# echo $second
one two three four
tommoa:~# for line in [@lines($multiline)][..2]
echo $line
end
one
two
tommoa:~# let second = [@lines($multiline)][..2]
tommoa:~# echo $second
one two