objective c - mutableCopy memory leak -

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can shed light why use of mutablecopy leaking memory?

- (id)objectinlistatindex:(unsigned)theindex {        nssortdescriptor *descriptor = [[[nssortdescriptor alloc] initwithkey:@"notenumber"  ascending:yes] autorelease];        [list sortusingdescriptors:[nsarray arraywithobjects:descriptor,nil]];        nsmutablearray *thearray = [list mutablecopy];        nsdictionary *thedict = [thearray objectatindex:theindex];        return thedict;  }

because mutablecopy returns retained object, , never release thearray.

copy methods return retained object caller responsible releasing. detailed in api docs , memory management guide.


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