c21 commented on a change in pull request #32159:
URL: https://github.com/apache/spark/pull/32159#discussion_r613730549
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File path: core/src/main/scala/org/apache/spark/util/collection/BitSet.scala
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@@ -240,7 +240,7 @@ class BitSet(numBits: Int) extends Serializable {
* Compute bit-wise union with another BitSet and overwrite bits in this
BitSet with the result.
*/
def union(other: BitSet): Unit = {
- require(this.numWords <= other.numWords)
+ require(this.numWords >= other.numWords)
var ind = 0
while( ind < this.numWords ) {
Review comment:
Force equal length of two bitsets sounds fine. btw Java
`java.util.BitSet` allows two bitsets to be different lengths (`or()`, `and()`,
etc).
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