Problems when using release on NSMutableURLRequest

Question

I have a question on the topic of memory management. When I create a NSMutableURLRequest and I release it, after the method return the application crash.

If I remove the line with release on NSMutableURLRequest the application works. But it let memory leak.

What´s wrong?

This is the code:

- (NSString *) callServerWhaitReturn {

    NSMutableURLRequest * theRequest = [ NSMutableURLRequest requestWithURL: [NSURL URLWithString: self.internalUrl] cachePolicy: NSURLRequestUseProtocolCachePolicy timeoutInterval: 60.0];

    [theRequest setHTTPMethod: @"POST"];
    [theRequest setHTTPBody:[[NSString stringWithFormat:@"p1=%@", self.parameters] dataUsingEncoding: NSASCIIStringEncoding]];
    NSURLResponse * response;
    NSError * error;
    NSData * result = [NSURLConnection sendSynchronousRequest: theRequest returningResponse: &response error: &error];
    NSString * toReturn = [[[NSString alloc] initWithData: result encoding:NSASCIIStringEncoding] autorelease];
    NSLog(@"%@", toReturn );
    [theRequest release];
    if (response) {
        [response release];
    }
    if (result) {
        [result release];
    }
    [toReturn autorelease];
    return toReturn;
}

Answer 1

requestWithURL:cachePolicy:timeoutInterval: returns an autoreleased object. If you haven't retained it, you shouldn't be releasing it.

Here are the memory management rules.