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Re: NSMutableArray becomes NSString?

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Re: NSMutableArray becomes NSString?

Subject: Re: NSMutableArray becomes NSString?
From: David Phillip Oster <email@hidden>
Date: Fri, 13 Apr 2007 19:05:16 -0700

It is very easy to forget to write a copyWithZone: for your class, have the program work for months, make a minor change to it, and have the super class's default implementation get called, which blindly copies all your ivars, dealloc an instance, and your dealloc releases all the parts, and now original object is points at a dead part.

Mostly recently I've seen this with an NSTableView with a custom cell. Since NSTableView's copying of your NSCell subclass happens "under the hood", this bug is mysterious and hard to track down until you've seen it.

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