EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000010

Question

我是一种使用密钥整理NSManagedObjects的方法。该方法如下所示：

- (NSMutableArray *)sortArrayDateWise:(NSMutableArray *)arr_msg withKey:(NSString *)str_key isAscending:(BOOL)isAscending andDateFormat:(NSString *)str_dateFormat {

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    [formatter setDateFormat:str_dateFormat];

    NSComparator compareDates = ^(id string1, id string2) {
        NSDate *date1 = [formatter dateFromString:string1];
        NSDate *date2 = [formatter dateFromString:string2];

        return [date1 compare:date2];
    };

    NSSortDescriptor *sortDesc = [[NSSortDescriptor alloc] initWithKey:str_key ascending:isAscending comparator:compareDates];

    [arr_msg sortUsingDescriptors:[NSArray arrayWithObjects:sortDesc, nil]];

    return arr_msg;
}

大部分时间它都能很好地工作，但有时会出现像

这样的错误

EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000010

如何解决这个问题？