getSaveFilePath

Using Cinder
1

Hello,

getSaveFilePath intermittently causes an assertion within macOS. I can’t figure out the conditions that cause it to happen. In another app I am working on I have had the same problem, and not passing any file types into getSaveFilePath (i.e. no 2nd argument) often helped.

Assertion failure in -[NSSavePanel _attachSandboxExtensions:toURL:orURLs:]

I’ve tried one of the sample apps that uses getSaveFilePath and it doesn’t have this issue (which suggests that something is amiss with my project, but I can’t think of what I might have modified that is relevant). I’m running 10.15.7.

Any tips or thoughts on how to debug?

I’m using the dev branch of libcinder, but I believe I had this issue also with the latest stable release, too. (I’ve made some tweaks to ImGui to update it to its latest release.)

Chaim

2021-07-29 19:47:46.224255-0700 Castle2d[49141:3256573] Metal API Validation Enabled
2021-07-29 19:47:54.709993-0700 Castle2d[49141:3256573] *** Assertion failure in -[NSSavePanel _attachSandboxExtensions:toURL:orURLs:], /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1894.60.101/Nav.subproj/OpenAndSavePanelRemote/NSVBOpenAndSavePanels.m:712
2021-07-29 19:47:54.712770-0700 Castle2d[49141:3256573] -[NSSavePanel observeValueForKeyPath:ofObject:change:context:] caught non-fatal NSInternalInconsistencyException 'ROSP: sandbox extension failure: nil result or wrong class type ((null)) for enumerated URL (file:///Users/chaim/Documents/Projects/Castles/Castle2d/assets/maps/box.c2d, /Users/chaim/Documents/Projects/Castles/Castle2d/assets/maps/box.c2d)!' with backtrace (
	0   CoreFoundation                      0x00007fff327f5627 __exceptionPreprocess + 250
	1   libobjc.A.dylib                     0x00007fff6b6d55bf objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff3281e7c8 +[NSException raise:format:arguments:] + 88
	3   Foundation                          0x00007fff34f1090d -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 191
	4   AppKit                              0x00007fff303decee __53-[NSSavePanel _attachSandboxExtensions:toURL:orURLs:]_block_invoke + 309
	5   CoreFoundation                      0x00007fff3276cfc7 __NSARRAY_IS_CALLING_OUT_TO_A_BLOCK__ + 7
	6   CoreFoundation                      0x00007fff327837b5 -[__NSSingleObjectArrayI enumerateObjectsWithOptions:usingBlock:] + 80
	7   AppKit                              0x00007fff303dea89 -[NSSavePanel _attachSandboxExtensions:toURL:orURLs:] + 125
	8   AppKit                              0x00007fff303e3826 -[NSSavePanel _URLsWithSecurityScoped:] + 193
	9   AppKit                              0x00007fff303ded27 -[NSSavePanel _attachSandboxExtensionsAndStartAccessing] + 48
	10  AppKit                              0x00007fff303df6c2 -[NSSavePanel nameFieldStringValue] + 27
	11  AppKit                              0x00007fff303e00d3 -[NSSavePanel completeWithReturnCode:url:urls:] + 259
	12  AppKit                              0x00007fff303e2062 -[NSSavePanel observeValueForKeyPath:ofObject:change:context:] + 341
	13  Foundation                          0x00007fff34de6d70 NSKeyValueNotifyObserver + 335
	14  Foundation                          0x00007fff34ed619c NSKeyValueDidChange + 437
	15  Foundation                          0x00007fff34f77eb1 NSKeyValueDidChangeWithPerThreadPendingNotifications + 146
	16  ViewBridge                          0x00007fff65533310 __41-[NSViewBridge setObject:forKey:withKVO:]_block_invoke + 360
	17  ViewBridge                          0x00007fff655b6d20 withHintInProgress + 472
	18  ViewBridge                          0x00007fff65529a33 -[NSViewBridge setObject:forKey:withKVO:] + 856
	19  ViewBridge                          0x00007fff6552b136 -[NSViewBridge nonLocalChangeInProgress:block:] + 352
	20  ViewBridge                          0x00007fff6552ad93 -[NSRemoteViewMarshal exceptionSafeSetRemoteObject:forKey:withReply:] + 264
	21  ViewBridge                          0x00007fff6552ac47 -[NSRemoteViewMarshal setRemoteObject:forKey:withReply:] + 56
	22  CoreFoundation                      0x00007fff3275b37c __invoking___ + 140
	23  CoreFoundation                      0x00007fff3275b221 -[NSInvocation invoke] + 303
	24  ViewBridge                          0x00007fff655283e4 __deferNSXPCInvocationOntoMainThread_block_invoke + 228
	25  ViewBridge                          0x00007fff65516e38 __wrapBlockWithVoucher_block_invoke + 37
	26  ViewBridge                          0x00007fff65516c07 __deferBlockOntoMainThread_block_invoke_2 + 507
	27  CoreFoundation                      0x00007fff3277947c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
	28  CoreFoundation                      0x00007fff327793c4 __CFRunLoopDoBlocks + 379
	29  CoreFoundation                      0x00007fff327788bd __CFRunLoopRun + 2450
	30  CoreFoundation                      0x00007fff327778ce CFRunLoopRunSpecific + 462
	31  HIToolbox                           0x00007fff313a3abd RunCurrentEventLoopInMode + 292
	32  HIToolbox                           0x00007fff313a37d5 ReceiveNextEventCommon + 584
	33  HIToolbox                           0x00007fff313a3579 _BlockUntilNextEventMatchingListInModeWithFilter + 64
	34  AppKit                              0x00007fff2f9ea039 _DPSNextEvent + 883
	35  AppKit                              0x00007fff2f9e8880 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352
	36  AppKit                              0x00007fff2fceaef2 -[NSApplication _doModalLoop:peek:] + 315
	37  AppKit                              0x00007fff2fce9c85 __35-[NSApplication runModalForWindow:]_block_invoke_2 + 64
	38  AppKit                              0x00007fff2fce9c32 __35-[NSApplication runModalForWindow:]_block_invoke + 70
	39  AppKit                              0x00007fff2fce94c4 _NSTryRunModal + 100
	40  AppKit                              0x00007fff2fce93a9 -[NSApplication runModalForWindow:] + 128
	41  AppKit                              0x00007fff303e3127 -[NSSavePanel runModal] + 145
	42  Castle2d                            0x000000010005ad47 _ZN6cinder3app13PlatformCocoa15getSaveFilePathERKN3ghc10filesystem4pathERKNSt3__16vectorINS7_12basic_stringIcNS7_11char_traitsIcEENS7_9allocatorIcEEEENSC_ISE_EEEE + 503
	43  Castle2d                            0x000000010006d6fb _ZN6cinder3app7AppBase15getSaveFilePathERKN3ghc10filesystem4pathERKNSt3__16vectorINS7_12basic_stringIcNS7_11char_traitsIcEENS7_9allocatorIcEEEENSC_ISE_EEEE + 43
	44  Castle2d                            0x0000000100031469 _ZN11Castle2dApp8saveFileEN3ghc10filesystem4pathEb + 153
	45  Castle2d                            0x0000000100031295 _ZN11Castle2dApp7keyDownEN6cinder3app8KeyEventE + 469
	46  Castle2d                            0x000000010016abfe _ZN6cinder3app6Window11emitKeyDownEPNS0_8KeyEventE + 190
	47  Castle2d                            0x00000001000b4944 -[CinderViewMac keyDown:] + 436
	48  AppKit                              0x00007fff2fb90d5d -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] + 6512
	49  AppKit                              0x00007fff2fb8f1c9 -[NSWindow(NSEventRouting) sendEvent:] + 349
	50  AppKit                              0x00007fff2fb8defe -[NSApplication(NSEvent) sendEvent:] + 2826
	51  AppKit                              0x00007fff2f9da5bf -[NSApplication run] + 707
	52  Castle2d                            0x0000000100149d7f _ZN6cinder3app6AppMac6launchEv + 47
	53  Castle2d                            0x0000000100032641 _ZN6cinder3app6AppMac4mainI11Castle2dAppEEvRKNSt3__110shared_ptrINS0_8RendererEEEPKciPKPcRKNS4_8functionIFvPNS0_7AppBase8SettingsEEEE + 417
	54  Castle2d                            0x000000010003238c main + 172
	55  libdyld.dylib                       0x00007fff6c87dcc9 start + 1
)
2

I’d say this is macOS and the moving target that is their security model. It’s possible that the OS is remembering the last folder the NSSavePanel was in but the app in question, being sandboxed, doesn’t have access to that folder so it borks. This would explain the sporadic nature since it’s dependent on what you’ve been opening/saving prior to running your app.

You can disable sandboxing for your app, grant it full disk access in the system prefs / security section, or only allow your app to open from folders to which access has been granted.

3

Thanks, Lithium. I’ll explore those routes and report back.