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Editorial Team
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Editorial Team
Asked: May 22, 20262026-05-22T12:53:00+00:00 2026-05-22T12:53:00+00:00

Hey, I’ve got a quick autorelease question. I understand basically how it works, but

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Hey, I’ve got a quick autorelease question. I understand basically how it works, but I was wondering if the following would create a memory leak.

NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

NSString* string = [[[NSString alloc] init] autorelease];
[[string retain] autorelease];

[pool drain];

Will the string be sent two release messages?

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  1. Editorial Team
    Editorial Team
    2026-05-22T12:53:01+00:00Added an answer on May 22, 2026 at 12:53 pm

    Think of the your interaction with the retain count of an object purely as a delta.

    If you increase it by one, you need to decrease it by one for that object to potentially be released.

    So — yes — you increased it by one twice and decreased it by one twice in that code. Two releases on drain will be the result.

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