Re: How do I debug this?
Re: How do I debug this?
- Subject: Re: How do I debug this?
- From: "Ashley Clark" <email@hidden>
- Date: Fri, 10 Oct 2008 08:36:43 -0500 (CDT)
- Importance: Normal
> Stack trace:
>
> #0 0x92badc66 in -[NSException raise]
> #1 0x901c3283 in -[NSCarbonMenuImpl
> performActionWithHighlightingForItemAtIndex:]
> #2 0x901a0122 in AppKitMenuEventHandler
> #3 0x90c79303 in DispatchEventToHandlers
> #4 0x90c7873d in SendEventToEventTargetInternal
> #5 0x90c95092 in SendEventToEventTarget
> #6 0x90cc931d in SendHICommandEvent
> #7 0x90cefb6f in SendMenuCommandWithContextAndModifiers
> #8 0x90cefb2c in SendMenuItemSelectedEvent
> #9 0x90cefa3e in FinishMenuSelection
> #10 0x90ccc5cc in MenuSelectCore
> #11 0x90ccbfb7 in _HandleMenuSelection2
> #12 0x90ccbe2b in _HandleMenuSelection
> #13 0x900dcad3 in _NSHandleCarbonMenuEvent
> #14 0x900438dc in _DPSNextEvent
> #15 0x90042ca0 in -[NSApplication
> nextEventMatchingMask:untilDate:inMode:dequeue:]
> #16 0x9003bcdb in -[NSApplication run]
> #17 0x90008f14 in NSApplicationMain
> #18 0x00004e73 in main at main.m:13
>
> Leading to the message:
>
> 2008-10-10 15:57:59.552 Ortelius[43213:813] *** -[NSCFArray
> objectAtIndex:]: index (0) beyond bounds (0)
>
> How can I find out what array is being overrun here? There's no code
> of my own in the stack trace at this point, which appears to be the
> tail end of a menu selection (which makes sense, as it occurs during
> loading a file in response to the "Open" menu command). So far I've
> just been trying to guess what the problem might be by following
> 'hunches' but so far drawn a blank.
Have you tried setting a breakpoint on objc_exception_throw? That should
show you the moment the exception is being created and should let you know
who's calling the objectAtIndex:0 method.
Just doing a simple test here I get a stack trace that looks like this:
#0 0x96f9ee17 in objc_exception_throw
#1 0x968a1f2b in +[NSException raise:format:arguments:]
#2 0x968a1f6a in +[NSException raise:format:]
#3 0x95587bbf in _NSArrayRaiseBoundException
#4 0x95505548 in -[NSCFArray objectAtIndex:]
#5 0x0001fdb6 in -[JTApplicationDelegate showInventoryInformation:] at
JTApplicationDelegate.m:35
#6 0x95907b03 in -[NSApplication sendAction:to:from:]
#7 0x959b6540 in -[NSMenu performActionForItemAtIndex:]
#8 0x959b6245 in -[NSCarbonMenuImpl
performActionWithHighlightingForItemAtIndex:]
...snip...
#25 0x00002220 in main at main.m:13
--
Ashley Clark
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