Bad access in ReachabilityCallback

Question

I am getting bad access in following code, what can be the reason?

static void ReachabilityCallback(SCNetworkReachabilityRef target, SCNetworkReachabilityFlags flags, void *info) {
#pragma unused (target, flags)
NSCAssert(info != NULL, @"info was NULL in ReachabilityCallback");
NSCAssert([(__bridge NSObject *) info isKindOfClass:[Reachability class]], @"info was wrong class in ReachabilityCallback");