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[smallduck]

_beginRequestWithHandlerInvocation: contains
NSURLConnection *theConnection = [NSURLConnection connectionWithRequest:...delegate:...];
[info setObject:theConnection forKey:..];
This is dangerous since according to NSURLConnection documentation, connectionWithRequest:delegate: "Returns nil if a connection can't be created"

i believe should either make a way for a failure to bubble up through beginRequestWithTarget:, or create the NSURLConnection in init instead (unscheduled, using initWithRequest:delegate:startImmediately:NO) where failure can release self & return nil