The directoryenumerator from wezm

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I'm attempting to use an NSDirectoryEnumerator created via NSFileManager's enumeratorAtURL method. The enumerator returned fails to enumerate any paths and crashes the app when it is released. I've reduced the code the following:

- (void)enumerateResources {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSDirectoryEnumerator *enumerator  = [fileManager enumeratorAtURL:[[NSBundle mainBundle] resourceURL] 
                                           includingPropertiesForKeys:NULL 
                                                              options:NSDirectoryEnumerationSkipsSubdirectoryDescendants
                                                         errorHandler:nil];
    NSAssert(enumerator != nil, @"enumerator is nil");

    id pathname;
    for(pathname in enumerator) {
        NSLog(@"%@", pathname);
    }
}

When that method is run I get the following backtrace and the message, "GDB: Interrupted":

#0  0x022a3b00 in CFRelease ()
#1  0x000aef94 in -[NSURLDirectoryEnumerator dealloc] ()
#2  0x022a3acc in CFRelease ()
#3  0x022c8bcd in _CFAutoreleasePoolPop ()
#4  0x0000a99f in -[NSAutoreleasePool release] ()
#5  0x002baf84 in _UIApplicationHandleEvent ()
#6  0x02bf2afa in PurpleEventCallback ()
#7  0x0236ddc4 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ ()
#8  0x022ce737 in __CFRunLoopDoSource1 ()
#9  0x022cb9c3 in __CFRunLoopRun ()
#10 0x022cb280 in CFRunLoopRunSpecific ()
#11 0x022cb1a1 in CFRunLoopRunInMode ()
#12 0x002b3226 in -[UIApplication _run] ()
#13 0x002beb58 in UIApplicationMain ()
#14 0x00001fb4 in main (argc=1, argv=0xbfffef98) at /Users/wmoore/Source/DirectoryEnumerator/main.m:14

This project reproduces the problem.

If anyone has any suggestions they would be most welcome, otherwise I will submit a ticket to (open)radar. Its worth noting that using enumeratorAtPath works fine.

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