From @AlexDaniel

Code​:
my @​a = ‘a’..‘e’; say @​a.rotor(3, Inf, :partial)

Result (2015.12,2016.07)​:
((a b c) (d e))

Result (HEAD)​:
Cannot coerce Inf to an Int
  in block <unit> at /tmp/TtHxYDq4L6 line 1

Actually thrown at​:
  in block <unit> at /tmp/TtHxYDq4L6 line 1
«exit code = 1»

Bisectable points to rakudo/rakudo@59f040d

Please note that other forms were not really working. For example, change @​a.rotor to (‘a’..‘e’).rotor and Inf is no longer accepted. Still, I think Inf could be useful sometimes, we should consider making it work.

@lizmat - Status changed from 'new' to 'resolved'

From @zoffixznet

Fixed in rakudo/rakudo@7ddc5f7