hhvm/hphp/test/slow/object/644.php.expect

int(0)
object(A)#1 (1) {
  ["a"]=>
  int(0)
}
int(1)
object(A)#2 (1) {
  ["a"]=>
  int(1)
}
object(B)#3 (1) {
  ["a"]=>
  int(10)
}
bool(true)
bool(true)
bool(false)
bool(true)