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POVariable declarations inside of a method causing gdb garbage output prior to instantiation
 

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  1. POVariable declarations inside of a method causing gdb garbage output prior to instantiation
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    <p>This is a really weird one and I'm wondering if I need to change my coding style a bit or if gdb is bugging out on me.</p> <p>The structure of one of my methods looks like this:</p> <pre><code>{ // code that checks if this method needs to do something // ... // further down, I instantiate e.g. foo as an NSArray NSArray *foo = bar; // ... } </code></pre> <p>If I debug the above code, I happen to have a <code>NSDictionary</code> called sizes. Because I am instantiating foo some lines into the method, I keep getting these errors in console up until foo is created:</p> <pre><code>-[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x541cb90 </code></pre> <p>The reason why this happens is that <strong>both sizes and foo are pointing at the same memory 0x541cb90</strong>. But since I haven't even CREATED foo yet, I can't really do anything about it. The error appears repeatedly until I step into the foo = bar point, where it stops appearing. The reason it appears is I think because it's trying to show me the values for it in the debug variable window to the right. </p> <p>This may be related to <a href="https://stackoverflow.com/questions/4284277/libxcodedebuggersupport-dylib-is-missing-in-ios-4-2-1-development-sdk">libXcodeDebuggerSupport.dylib is missing in iOS 4.2.1 development SDK</a></p> <p>Is it simply bad practice to declare variables "throughout" a method like this? It feels wasteful to declare every variable I ever intend to use inside a method at the very top, but maybe I have to...?</p>
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