JavaConversions.MapWrapper generates wrong hashCode eventually #5880
Description
scala.collection.JavaConversions.MapWrapper's entrySet method seems to generate a Set having wrong hashCode() implementation. The hashcode has the possibility of conflict.
I checked the problem with the following code:
import scala.collection.JavaConversions._
object App {
def main(args:Array[String]) = {
val jm:java.util.Map[String, String] = scala.collection.mutable.Map("a" -> "b", "b" -> "a")
val es = jm.entrySet()
val it = es.iterator
println(it)
while (it.hasNext) {
val x = it.next()
println("key=" + x.getKey + ", val=" + x.getValue)
println("hashCode=" + x.##)
}
}
}=========
output
scala.collection.JavaConversions$MapWrapper$$anon$1$$anon$5@6cb8
key=a, val=b
hashCode=195
key=b, val=a
hashCode=195