xcode 7 Objective c Warning - Null passed to a callee that requires a non-null argument

Question

After Updating XCODE 7, I'm getting this warning, I am trying to get rid of this but I can't find a proper solution:

CFRelease(CFNetworkCopyProxiesForURL((CFURLRef)theURL, NULL));

Warning is:

Null passed to a callee that requires a non-null argument

Answer 1

Found a hack to get rid of this warning

 NSDictionary *proxySettings = NSMakeCollectable([(NSDictionary *)CFNetworkCopySystemProxySettings() autorelease]);
    CFRelease(CFNetworkCopyProxiesForURL((CFURLRef)theURL, (CFDictionaryRef)proxySettings));