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object Test {
def main(args: Array[String]): Unit = {
try new BooleanPropImpl() value
catch {
case e: RuntimeException => println("runtime exception")
}
}
}
trait Prop[@specialized(Boolean) +T] {
def value: T
}
class PropImpl[+T] extends Prop[T] {
def value: T = scala.sys.error("")
}
trait BooleanProp extends Prop[Boolean]
class BooleanPropImpl() extends PropImpl[Boolean] with BooleanProp
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