Xcode 7 Objective c Warning - null passed to the called party that requires a non-empty argument

Question

After updating XCODE 7, I get this warning, I try to get rid of it, but I can not find the correct solution:

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

Warning:

Zero passed to the called party, which requires a non-empty argument

Answer 1

Found a hack to get rid of this warning

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