Game crashes on ipad while using Native Box 2d.

Hello, I'm using Native Box 2d for physics collision . It is working good on Imac ,but when i test the game in Ipad ,the game crashes.Don't know what is the problem cause it doesn't show any error in console in unity editor. It was working good in both system and device before i had updated unity i think . Xcode shows that the game crashes when this function is called Collider2D::GetIsTrigger().