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class Foo{ override def equals(o: Any) = false; override def hashCode = 1}
object Test {
def main(args: Array[String]) {
import collection.immutable.HashMap
var m = Map[Foo, Int]()
for (i <- 1 to 30000) m += (new Foo) -> i
assert(m.size == 30000)
m.toString
}
}
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