Seq.rest() throws an exception when invoked on a single item sequence

[olivr70]

I am using the version 4.0.0-rc.2

What happened

An exception was thrown at Iterator.next() (immutable.js line 1496)

How to reproduce

var r = Seq(['a']).rest()
var x = [...r] // throws 'TypeError: iterator.next is not a function'

This also occurs with multiple items in the sequence, on the last iteration when invoking .rest() (or .slice(1)) several times

[olivr70]

As a temporary quick and dirty solution, I patched line 1491 of immutable.js (method sliceSeq.__iteratorUncached)

var iterator = sliceSize !== 0 && collection.__iterator(type, reverse);

to

    var iterator = sliceSize !== 0 ? collection.__iterator(type, reverse)
      : emptySequence()[Symbol.iterator]()

There is certainly a better solution to return an empty sequence, that's why I did not PR