Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/21102#discussion_r205930801
--- Diff:
core/src/main/scala/org/apache/spark/util/collection/OpenHashSet.scala ---
@@ -272,7 +272,7 @@ class OpenHashSet[@specialized(Long, Int) T: ClassTag](
private def nextPowerOf2(n: Int): Int = {
if (n == 0) {
- 1
+ 2
--- End diff --
Oh, good catch.
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