Bug when zip with longs and too many partitions?

[Michael Malak]

Is this a bug?

scala> sc.parallelize(1 to 2,4).zip(sc.parallelize(11 to 12,4)).collect
res0: Array[(Int, Int)] = Array((1,11), (2,12))

scala> sc.parallelize(1L to 2L,4).zip(sc.parallelize(11 to 12,4)).collect
res1: Array[(Long, Int)] = Array((2,11))