Re: Leopard crash in standard open and save panel

FROM : David Arve
DATE : Sat Dec 01 16:24:56 2007

Hi,

What happens is that the panel is added to the autoreleasepool and 
hence released after a release cycle. What you want to do is to add a 
[pan retain] in your saveGraphics method and a retain message in your 
savePanelDidEnd method. I think.

/David

On 30 nov 2007, at 22.34, John Nairn wrote:

> Since upgrading to Leopard , I have noticed frequent crashes after 
> entering a standard Cocoa open or save panel. It even happens in 
> openDocument: command linked to Open... menu command that is built 
> into NSApplication and I have not overridden that method. This same 
> code has worked fine ever since 10.0. It seems worse building to 
> "Current Mac OS" than to "10.4 (Universal)", but now I am seeing if 
> in both bulds
>
> For example, this method (a target of a menu command) just crashed
>
> // save graphics to PDF file
> - (IBAction)saveGraphics:(id)sender
> {
>  NSSavePanel *pan = [NSSavePanel savePanel];
>  [pan setRequiredFileType:[self graphicsExtension]];
>  [pan setTitle:@"Save Graphics"];
>  [pan beginSheetForDirectory:nil file:nil
>      modalForWindow:[self window] modalDelegate:self
>      didEndSelector:@selector(savePanelDidEnd:returnCode:contextInfo:)
>      contextInfo:nil];
> }
>
> The sheet opens, but then crashes before I can interact with it. 
> Part of crash log is below (full log is too long for this list)
>
> Process:        NairnFEAMPM [288]
> Path:            /Users/jnairn/Programming/Cocoa_Projects/
> NairnFEAMPM/build/Default/NairnFEAMPM.app/Contents/MacOS/NairnFEAMPM
> Identifier:      com.geditcom.NairnFEAMPM
> Version:        Version 1.6 (build 1)
> Code Type:      X86 (Native)
> Parent Process:  launchd [94]
>
> Date/Time:      2007-11-29 12:34:58.467 -0800
> OS Version:      Mac OS X 10.5.1 (9B18)
> Report Version:  6
>
> Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
> Exception Codes: KERN_INVALID_ADDRESS at 0x00000000c5ff271f
> Crashed Thread:  0
>
> Thread 0 Crashed:
> 0  libobjc.A.dylib                   0x965126e8 objc_msgSend + 24
> 1  com.apple.AppKit                 0x91de4834 -[NSTextStorage 
> fontSetChanged] + 363
> 2  com.apple.CoreFoundation         0x96b97da5 -[NSArray 
> makeObjectsPerformSelector:] + 565
> 3  com.apple.AppKit                 0x91de4661 +[NSTextStorage 
> _fontSetChanged:] + 228
> 4  com.apple.Foundation             0x918ad77c _nsnote_callback + 364
> 5  com.apple.CoreFoundation         0x96b0aa4a __CFXNotificationPost 
> + 362
> 6  com.apple.CoreFoundation         0x96b0ad23 
> _CFXNotificationPostNotification + 179
> 7  com.apple.Foundation             0x918aaa70 -[NSNotificationCenter 
> postNotificationName:object:userInfo:] + 128
> 8  com.apple.Foundation             0x918b4108 -[NSNotificationCenter 
> postNotificationName:object:] + 56
> 9  com.apple.AppKit                 0x92009e29 +[NSFont 
> _postFontSetChangedNotifications] + 75
> 10  com.apple.Foundation             0x918aec43 
> __NSThreadPerformPerform + 547
> 11  com.apple.CoreFoundation         0x96b29698 CFRunLoopRunSpecific + 
> 3240
> 12  com.apple.CoreFoundation         0x96b29d38 CFRunLoopRunInMode + 88
> 13  com.apple.HIToolbox               0x9003b8a4 
> RunCurrentEventLoopInMode + 283
> 14  com.apple.HIToolbox               0x9003b5f6 ReceiveNextEventCommon 
> + 175
> 15  com.apple.HIToolbox               0x9003b531 
> BlockUntilNextEventMatchingListInMode + 106
> 16  com.apple.AppKit                 0x91bacd5b _DPSNextEvent + 657
> 17  com.apple.AppKit                 0x91bac6a0 -[NSApplication 
> nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
> 18  com.apple.AppKit                 0x91ba56d1 -[NSApplication run] + 
> 795
> 19  com.apple.AppKit                 0x91b729ba NSApplicationMain + 574
> 20  com.geditcom.NairnFEAMPM         0x000023c6 _start + 216
> 21  com.geditcom.NairnFEAMPM         0x000022ed start + 41
>
> ---------------
> John Nairn (1-541-737-4265, FAX:1-541-737-3385)
> Professor and Richardson Chair
> Web Page: http://woodscience.oregonstate.edu/faculty/Nairn
> FEA/MPM Web Page: http://oregonstate.edu/~nairnj
>
>
>
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