Crashes with NSOpenPanel and garbage collection

FROM : Daniel Parnell
DATE : Fri May 09 04:12:00 2008

Hi All,

  I'm having an interesting problem.  I'm trying to use NSOpenPanel 
to select some files (as one usually does), however if I compile with 
garbage collection on and then try to use the Music, Photos or Movies 
areas in the open panel I get very strange crashes.  If I've 
previously opened a file from one of these areas and the open panel is 
now defaulting to them then simply using Command-O will also cause the 
same crash.

Is there some special magic I need to use to allow me to use 
NSOpenPanel and the special Photo, Music and Movies areas with garbage 
collection turned on?

I'm able to replicate this crash in a simple little app I threw 
together containing the following code.

- (IBAction) doIt:(id)sender {
   NSOpenPanel* panel = [NSOpenPanel openPanel];
   [panel setAllowsMultipleSelection: YES];
   [panel setPrompt: NSLocalizedString(@"Insert", @"Insert Prompt")];
   [panel setAllowedFileTypes: [NSImage imageTypes]];
   
   [panel beginSheetForDirectory: nil file: nil modalForWindow: window 
modalDelegate: self 
didEndSelector:@selector(insertPanelDidEnd:returnCode:contextInfo:) 
contextInfo: nil];
}

- (void)insertPanelDidEnd:(NSOpenPanel *)panel returnCode:
(int)returnCode  contextInfo:(void  *)contextInfo {
   if(returnCode==NSOKButton) {
       NSLog(@"got files=%@", [panel filenames]);
   }
}


Daniel