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Finding an exception in Objective c code

I am debugging my application on iphone (OS 2.0) using X-code 3.1 iphone SDK 3.0 beta 5. My application throws the message * Application terminated due to an unmapped "NSRangeException", reason: "* - [NSCFArray insertObject: atIndex:] : index (8) out of bounds (8) '2009-05-23 17: 13: 32.304 myApp [405: 5a07] Stack: (808163835, 806099672, 807978623, 807978527, 812332907, 812067179, 812067103, 126035, 812081649, 812081343 , 826526801)

In gdb, when I give commands (gdb) info line 126035 Line number 126035 is out of range for "/ Users / videomac / manish / EXPLab / 2009-05-18-12-27 myApp / main.m".

(gdb) info line * 126035 Line 527 "/ Users / videomac / manish / EXPLab / 2009-05-18-12-27 myApp / Classes / PlaybackThread / Playback.m" starts at address 0x1ec52 <- [Playback startPlaybackThread:] + 514> and ends with 0x1ec6a <- [Play startPlaybackThread:] + 538>.

this means that the crash is related to the code in my method [Play startPlaybackThread:] what does no mean +514 and +538, do they mean line no?

Is there any other way to find the cause of the crashes?

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The easiest way to find where your exception is occurring is to set breakpoints - [NSException raise] and objc_exception_throw in gdb. Then you will break as soon as that happens and you can check the stack at that point.



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About the first error you mentioned from - insertObject: atIndex: documentation:

Important : Throws an NSRangeException if the index is greater than the number of elements in the array.



I would search for calls to this method trying to find which one is causing the error.

The numbers +514 and +538 give the offset from the instruction code immediately before that.

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