iOS Dictionary causes memory leak - ios

Question

Why would the following implementation of the Dictionary cause a memory leak? See the screenshot below as well. Practically all of the leaks there are from this method.
- (void) setLocation:(NSString *) location:(NSString *) turnPage {
NSLog(#"Start setLocation");
//---get the path to the property list file---
NSString *localPlistFileNameConf = [[self documentsPath] stringByAppendingPathComponent:#"Config.plist"];
NSMutableDictionary *copyOfDict;
//---if the property list file can be found---
if ([[NSFileManager defaultManager] fileExistsAtPath:localPlistFileNameConf]) {
//---load the content of the property list file into a NSDictionary object---
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:localPlistFileNameConf];
//---make a mutable copy of the dictionary object---
copyOfDict = [dict mutableCopy];
[dict release];
}
else {
//---load the property list from the Resources folder---
NSString *pListPath = [[NSBundle mainBundle] pathForResource:#"Config" ofType:#"plist"];
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:pListPath];
//---make a mutable copy of the dictionary object---
copyOfDict = [dict mutableCopy];
[dict release];
}
location = [self checkLocationValidity:location:turnPage];
[copyOfDict setValue:location forKey:#"Location"];
[self writeConfigToFile:copyOfDict];
NSLog(#"End setLocation");
}

Answer 1

You're not releasing copyOfDict anywhere. You own any object created with a method that starts with copy, so you need to release those objects. It's probably misreporting the source as the original dictionary due to a bit of trickery in the NSDictionary class cluster for efficiency reasons. Try running analyse over your code, it should point these things out to you.