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Editorial Team
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Asked: 2026-06-14T09:42:11+00:00

In didFinishLaunchingWithOptions, the first code is: NSMutableArray *k = [[NSMutableArray alloc] initWithCapacity:10]; [k release];

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In didFinishLaunchingWithOptions, the first code is:

NSMutableArray *k = [[NSMutableArray alloc] initWithCapacity:10];
[k release];

(I reduced it to this case after much debugging) and I’m getting

*** -[__NSArrayM class]: message sent to deallocated instance 0x7576c90
*** -[__NSArrayM respondsToSelector:]: message sent to deallocated instance 0x7576c90

If I check the retainCount on ‘k’ after the alloc line, it is 1. If I replace NSMutableArray by NSArray everything is fine. What the heck is going on here??

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1 Answer

  1. Editorial Team

    That error must be coming from somewhere else. Which means you’re using it.
    Else, you wouldn’t have

    *** -[__NSArrayM respondsToSelector:]: message sent to deallocated instance 0x7576c90

    But something like :

    *** -[__NSArrayM release]: message sent to deallocated instance 0x7576c90

    Plus, you should not use retainCount (see why here).

    Just check that you’re not using it anywhere else. Or maybe you’re using ARC ? In which case you don’t need to release it.

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