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POXcode 4.4.1 build crashing on Snow Leopard
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  1. POXcode 4.4.1 build crashing on Snow Leopard
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    copied!<p>I have a project which I am compiling under OS X 10.7.4 using Xcode 4.4.1</p> <p>I am using Base SDK SDKROOT macosx10.7 I have set Deployment Target MACOSX_DEPLOYMENT_TARGET 10.6</p> <p>I tested a recent build on Snow Leopard and it crashed. Previous builds using Xcode 4.2 and 4.3 did work, and I can compile on Snow Leopard using Xcode version 3.2.6</p> <p>Has anyone else had this experience, or better know what I can do to resolve it?</p> <pre><code>OS Version: Mac OS X 10.6.8 (10K549) Report Version: 6 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000030 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Application Specific Information: objc[274]: garbage collection is ON Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 com.apple.AppKit -[NSImage _allocAuxiliaryStorage] + 158 1 com.apple.AppKit -[NSImage copyWithZone:] + 66 2 libobjc.A.dylib objc_setProperty + 82 3 -[TreeViewController(Dirs) outlineView:willDisplayCell:forTableColumn:item:] + 207 </code></pre> <hr> <p><strong>PS Just restored Xcode 4.2.1 from TimeMachine backup and the build works on Snow Leopard</strong> </p> <p>I "upgraded" to Mountain Lion - which would not allow Xcode 4.2.1 to run. (This also seemed to delete the OSX 10.8 and Xcode 4.4 SDK and the command line tools :-( ). This made it impossible to just use the precious compiler.</p> <p>I tried to follow up where the crash was happening, which appeared to be in a call to setNodeIcon which was defined in one of my classes as </p> <pre><code>@property (copy) NSImage *nodeIcon; </code></pre> <p>I realise I will have to convert to ARC eventually, but was reluctant to embark on this yet. The conversion was far from straightforward and I am not sure I understand all the changes I was required to make (one file at a time) in particular the Toll-Free Bridging changes.</p> <p>The resultant ARC code does seem to work on 10.6 - 10.8 but I need to do a lot of regression and leak testing to confirm.</p> <hr> <h2>Updated Comments 2012-09-18</h2> <p>The ARC code works but I found a couple of problems (which I have resolved) but need to do a lot more.</p> <p>I went back to my GC code and changed <code>copy</code> to <code>assign</code>. This seemed to work.</p> <pre><code>@property (assign) NSImage *nodeIcon; </code></pre> <p>Just to confirm I made a standalone app (see below) which does nothing but copy an NSImage. This crashed in the same way, so it seems to be a bug in the compiler.</p> <pre><code>#import &lt;Cocoa/Cocoa.h&gt; @interface AppDelegate : NSObject &lt;NSApplicationDelegate&gt; { NSImage *nodeIcon; } @property (assign) IBOutlet NSWindow *window; @property (copy) NSImage *nodeIcon; @end #import "AppDelegate.h" @implementation AppDelegate @synthesize nodeIcon; - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { NSString *defaultDirectory = NSHomeDirectory(); [self setNodeIcon:[[NSWorkspace sharedWorkspace] iconForFile:defaultDirectory]]; } @end </code></pre>
 

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