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Editorial Team
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Asked: 2026-05-21T15:17:47+00:00

I’m trying to understand the Leaks Instrument Tool that Xcode4 provides us. The screenshot

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I’m trying to understand the Leaks Instrument Tool that Xcode4 provides us. The screenshot below shows me a couple of leaks (I think). I was wondering how to read the Leaked object and diagnose where the leak is coming from. Anyone have any suggestions to what [NSPlaceholderMutableString …] is? I don’t have this declared anywhere in the program itself.
enter image description here

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1 Answer

  1. Editorial Team
    1. NSPlaceholderMutableString is a private subclass of NSString, which is a class cluster.
    2. See that small little arrow in a circle? Click it couple of times and you’ll get to the code (if it’s yours). (Last time there will be no arrow, just double-click the row)
    3. Read carefully what the titles of the columns and navigation bar say. All info you needed is there 😉
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