Simple example not working

[nservidio]

Hey all, I'm trying the following:

- (void)viewDidLoad {
    [super viewDidLoad];
    NSMutableString *foo = [[NSMutableString alloc] initWithString:@"testpwd6"];
    track(foo);
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    wipeAll();
}

However, when I do a memory dump using https://github.com/Nightbringer21/fridump, I still see "testpwd6" in memory:

ntal�
ntalntaln�
 LOMo�
 MORq�
testpwd6�
labelColor�
storyboard�
MTL1,2�
GLES2,0�
ca.ttc�
 DLN�
ntal�
CAMediaTimingFunction�

Is this a known issue? Please let me know. Thanks!