Re: [Pyobjc-dev] Crash when closing all documents

[Ronald O. <ron...@ma...>]

On 19 Nov, 2009, at 1:48, Daniel Miller wrote:

> I'm having problems calling the selector provided by
> 
> NSDocumentController.closeAllDocumentsWithDelegate:didCloseAllSelector:contextInfo:
> 
> Here's my code:
> 
> class DocumentController(NSDocumentController):
>   ...
>   def closeAllDocumentsWithDelegate_didCloseAllSelector_contextInfo_(
>     self, delegate, selector, context):
>     def callback(result):
>         log.debug("%s.%s(%s, %s, %s)",
>             delegate, selector, self, result, context)
>         perform_selector(delegate, selector, self, result, context)
>     saver = DocumentSavingDelegate.alloc().\
>         initWithDocuments_callback_context_(
>             self.controller.iter_dirty_documents(), callback, context)
>     saver.save_next_document()
> 
> def perform_selector(delegate, selector, *args):
> #   sel = selector.replace(":", "_") # HACK
> #   getattr(delegate, sel)(*args)
>     inv = NSInvocation.invocationWithMethodSignature_(
>         delegate.methodSignatureForSelector_(selector))
>     inv.setTarget_(delegate)
>     inv.setSelector_(selector)
>     for i, arg in enumerate(args):
>         inv.setArgument_atIndex_(arg, i + 2)
>     inv.invoke()
> 
> Here's the debug message and stack trace I get when the callback gets called:
> 
> DEBUG <DocumentController: 0x114ab0>._documentController:shouldTerminate:context:(<DocumentController: 0x114ab0>, True, 1401200)
> 2009-11-18 19:32:36.137 EditXTDev[51404:60b] *** ObjC exception 'NSUncaughtSystemExceptionException' (reason: 'Uncaught system exception: signal 10') discarded
> Stack trace (most recent call last):
>   -[NSMenu _performActionWithHighlightingForItemAtIndex:] (in AppKit) + 49
>   -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] (in AppKit) + 174
>   -[NSMenuItem _corePerformAction] (in AppKit) + 435
>   -[NSApplication sendAction:to:from:] (in AppKit) + 112
>   -[NSApplication terminate:] (in AppKit) + 519
>   -[NSApplication _shouldTerminate] (in AppKit) + 669
>   -[NSApplication sendEvent:] (in AppKit) + 6431
>   -[NSWindow sendEvent:] (in AppKit) + 5549
>   -[NSControl mouseDown:] (in AppKit) + 812
>   -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] (in AppKit) + 524
>   -[NSCell trackMouse:inRect:ofView:untilMouseUp:] (in AppKit) + 1808
>   -[NSCell _sendActionFrom:] (in AppKit) + 169
>   -[NSControl sendAction:to:] (in AppKit) + 108
>   -[NSApplication sendAction:to:from:] (in AppKit) + 112
>   -[NSAlert buttonPressed:] (in AppKit) + 392
>   -[NSApplication endSheet:returnCode:] (in AppKit) + 349
>   -[NSAlert didEndSheet:returnCode:contextInfo:] (in AppKit) + 133
>   -[NSWindow orderOut:] (in AppKit) + 50
>   -[NSWindow orderWindow:relativeTo:] (in AppKit) + 105
>   -[NSWindow _reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] (in AppKit) + 1836
>   -[NSWindow(NSSheets) _orderOutRelativeToWindow:] (in AppKit) + 123
>   -[NSMoveHelper(NSSheets) _closeSheet:andMoveParent:] (in AppKit) + 463
>   -[NSWindow(NSSheets) _detachSheetWindow] (in AppKit) + 501
>   -[NSNotificationCenter postNotificationName:object:] (in Foundation) + 56
>   -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation) + 128
>   _CFXNotificationPostNotification (in CoreFoundation) + 186
>   __CFXNotificationPost (in CoreFoundation) + 905
>   _nsnote_callback (in Foundation) + 176
>   ffi_closure_SYSV (in _objc.so) + 196
>   method_stub (in _objc.so) + 1687
>   PyObject_Call (in libpython2.6.dylib) (abstract.c:2492)
>   function_call (in libpython2.6.dylib) (funcobject.c:524)
>   PyEval_EvalCodeEx (in libpython2.6.dylib) (ceval.c:2968)
>   PyEval_EvalFrameEx (in libpython2.6.dylib) (ceval.c:3917)
>   PyObject_Call (in libpython2.6.dylib) (abstract.c:2492)
>   pysel_call (in _objc.so) + 1264
>   PyObject_Call (in libpython2.6.dylib) (abstract.c:2492)
>   function_call (in libpython2.6.dylib) (funcobject.c:524)
>   PyEval_EvalCodeEx (in libpython2.6.dylib) (ceval.c:2968)
>   PyEval_EvalFrameEx (in libpython2.6.dylib) (ceval.c:3917)
>   PyObject_Call (in libpython2.6.dylib) (abstract.c:2492)
>   pysel_call (in _objc.so) + 1264
>   PyObject_Call (in libpython2.6.dylib) (abstract.c:2492)
>   function_call (in libpython2.6.dylib) (funcobject.c:524)
>   PyEval_EvalCodeEx (in libpython2.6.dylib) (ceval.c:2968)
>   PyEval_EvalFrameEx (in libpython2.6.dylib) (ceval.c:3802)
>   PyEval_EvalCodeEx (in libpython2.6.dylib) (ceval.c:2968)
>   PyEval_EvalFrameEx (in libpython2.6.dylib) (ceval.c:3802)
>   PyEval_EvalCodeEx (in libpython2.6.dylib) (ceval.c:2968)
>   PyEval_EvalFrameEx (in libpython2.6.dylib) (ceval.c:3917)
>   PyObject_Call (in libpython2.6.dylib) (abstract.c:2492)
>   objcsel_call (in _objc.so) + 230
>   PyObjCFFI_Caller (in _objc.so) + 2709
>   ffi_call (in _objc.so) + 147
>   .LCFI1 (in _objc.so) (x86-darwin.S:84)
>   -[NSInvocation invoke] (in CoreFoundation) + 136
>   __invoking___ (in CoreFoundation) + 29
>   -[NSDocumentController(NSInternal) _documentController:shouldTerminate:context:] (in AppKit) + 321
>   0xffffffff
>   _sigtramp (in libSystem.B.dylib) + 43
>   NSExceptionHandlerUncaughtSignalHandler (in ExceptionHandling) + 65
> 
> Am I doing something wrong or is this a bug?


You seem to get a bus error, although the code looks fine at first glance. Could you create a small self-contained project that suffers from the same problem, that would make debugging a lot easier for me.

Ronald