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Re: Duplicating an edited document in 10.7.1
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Re: Duplicating an edited document in 10.7.1


  • Subject: Re: Duplicating an edited document in 10.7.1
  • From: "Gerriet M. Denkmann" <email@hidden>
  • Date: Tue, 20 Sep 2011 21:53:50 +0700

On 20 Sep 2011, at 19:51, Mike Abdullah wrote:

>
> On 20 Sep 2011, at 10:49, Gerriet M. Denkmann wrote:
>
>> In my toy editor I open an existing document, modify it and click "Duplicate".
>>
>> A Sheet comes down and tells me that the duplicate will contain my latest modifications.
>> I click the default "Duplicate" button and get:
>>
>> 2011-09-20 16:29:43.164 TextEditor[4062:707] *** -[NSPathStore2 stringByAppendingPathExtension:]: nil argument
>> 2011-09-20 16:29:43.213 TextEditor[4062:707] (
>> 	0   CoreFoundation                      0x00007fff8742a986 __exceptionPreprocess + 198
>> 	1   libobjc.A.dylib                     0x00007fff80f84d5e objc_exception_throw + 43
>> 	2   CoreFoundation                      0x00007fff8742a7ba +[NSException raise:format:arguments:] + 106
>> 	3   CoreFoundation                      0x00007fff8742a744 +[NSException raise:format:] + 116
>> 	4   Foundation                          0x00007fff89d8a172 -[NSPathStore2 stringByAppendingPathExtension:] + 112
>> 	5   AppKit                              0x00007fff845808c3 -[NSDocument _preserveCurrentVersionForReason:error:] + 579
>> 	6   AppKit                              0x00007fff84586bc3 __-[NSDocument duplicateDocumentWithDelegate:didDuplicateSelector:contextInfo:]_block_invoke_3 + 119
>> 	7   AppKit                              0x00007fff845819a9 -[NSDocument _something:wasPresentedWithResult:soContinue:] + 21
>> 	8   AppKit                              0x00007fff84472bee -[NSAlert didEndAlert:returnCode:contextInfo:] + 93
>> 	9   AppKit                              0x00007fff8447f356 -[NSApplication endSheet:returnCode:] + 275
>> 	10  AppKit                              0x00007fff84472ab4 -[NSAlert buttonPressed:] + 265
>> 	11  CoreFoundation                      0x00007fff8741a11d -[NSObject performSelector:withObject:] + 61
>> 	12  AppKit                              0x00007fff842ce852 -[NSApplication sendAction:to:from:] + 139
>> 	13  AppKit                              0x00007fff842ce784 -[NSControl sendAction:to:] + 88
>> 	14  AppKit                              0x00007fff842ce6af -[NSCell _sendActionFrom:] + 137
>> 	15  AppKit                              0x00007fff844d758a -[NSButtonCell performClick:] + 594
>> 	16  AppKit                              0x00007fff84337afd -[NSButton performKeyEquivalent:] + 368
>> 	17  AppKit                              0x00007fff84337722 -[NSView _performKeyEquivalent:conditionally:] + 45
>> 	18  AppKit                              0x00007fff8433796d -[NSControl _performKeyEquivalent:conditionally:] + 119
>> 	19  AppKit                              0x00007fff84337850 -[NSView performKeyEquivalent:] + 155
>> 	20  AppKit                              0x00007fff84473d06 -[_NSAlertContentView performKeyEquivalent:] + 92
>> 	21  AppKit                              0x00007fff84337722 -[NSView _performKeyEquivalent:conditionally:] + 45
>> 	22  AppKit                              0x00007fff84337850 -[NSView performKeyEquivalent:] + 155
>> 	23  AppKit                              0x00007fff84337722 -[NSView _performKeyEquivalent:conditionally:] + 45
>> 	24  AppKit                              0x00007fff84337695 -[NSWindow performKeyEquivalent:] + 58
>> 	25  AppKit                              0x00007fff8485caeb -[NSWindow keyDown:] + 74
>> 	26  AppKit                              0x00007fff84297ad2 -[NSWindow sendEvent:] + 7404
>> 	27  AppKit                              0x00007fff8422ff19 -[NSApplication sendEvent:] + 5665
>> 	28  AppKit                              0x00007fff841c642b -[NSApplication run] + 548
>> 	29  AppKit                              0x00007fff8444452a NSApplicationMain + 867
>> 	30  TextEditor                          0x0000000100001bc0 main + 32
>> 	31  TextEditor                          0x0000000100001b94 start + 52
>> 	32  ???                                 0x0000000000000001 0x0 + 1
>> )
>>
>> TextEdit can duplicate a modified document without any problems.
>>
>> So obviously my program does something not quite right.
>> But as there is hardly any of my own code in this backtrace, how can I debug this?
>
> What NSDocument methods have you overridden?

Of the save stuff only:
- (id)fileWrapperOfType:(NSString *)typeName  error:(NSError **)outError

and:
+ (BOOL)autosavesInPlace
returns YES.


> Do any of them get called during this routine?

None, as seen from the backtrace.
After the exception fileWrapperOfType... gets called, but then everything is already screwed up.

Gerriet.


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References: 
 >Duplicating an edited document in 10.7.1 (From: "Gerriet M. Denkmann" <email@hidden>)
 >Re: Duplicating an edited document in 10.7.1 (From: Mike Abdullah <email@hidden>)

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