Hi all, A warning to NSPersistentDocument users....
Let's say you have an NSPersistentDocument-based app-- you do some work and you save successfully. Now let's say the app has a bug where its UI allows the user to set a value outside the allowable range of one of your NSManagedObjects. When you try to save, the OS will give a message like: "The document "Untitled" could not be saved as "Untitled". attribute is too large." The user is confused and panics. He tries to "Save As" under a different name instead. Similar error message. He messes around in the UI but cannot make the document 'conform'. He then tries "Save" again. Poof, it crashes! Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x000000005b14c4a3 Crashed Thread: 0 Thread 0 Crashed: 0 libobjc.A.dylib 0x9240e688 objc_msgSend + 24 1 com.apple.AppKit 0x96ba8070 -[NSDocument _willPresentSavingError:forOperation:url:] + 88 2 com.apple.AppKit 0x96a759f2 -[NSDocument _saveToURL:ofType:forSaveOperation:de legate:didSaveSelector:contextInfo:] + 611 3 com.apple.AppKit 0x96a75787 -[NSDocument saveToURL:ofType:forSaveOperation:delegate:didSaveSelector:contextInfo:] + 860 4 com.apple.AppKit 0x96aab8a1 -[NSDocument _saveDocumentWithDelegate:didSaveSelector:contextInfo:] + 810 5 com.apple.AppKit 0x96aab56f -[NSDocument saveDocumentWithDelegate:didSaveSelector:contextInfo:] + 366 6 com.apple.AppKit 0x96aab3f8 -[NSDocument saveDocument:] + 58 This repros with a trivial test app in both 10.5.8 and, um, newer. <http://www.rogue-research.com/EpicSaveFail7169032.zip> <rdar://problem/7169032> So be sure to fix all your validation errors, because the frameworks are not forgiving! :( -- ____________________________________________________________ Sean McBride, B. Eng s...@rogue-research.com Rogue Research www.rogue-research.com Mac Software Developer Montréal, Québec, Canada _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
