equals returns false when class inherits from other class

[pdorobisz]

Given following classes:

class A() {}

class B(val x:String) extends A {
   override def equals(other: Any): Boolean = ScalaEquals.equal
   def canEqual(other: Any): Boolean = ScalaEquals.canEquals
}

generated equals method will always return false:

val b1 = new B("A")
val b2 = new B("A")
println(b1 == b2) // false despite the fact that 'x' has same value in both instances

Equals will return true (in this case) when "extends A" is removed from B's declaration.