ABPeoplePicker Crash for Only One Person - iphone

Question

I have an app that only crashes for one of my tester’s - no one else’s. But it crashes consistently for her. It’s very odd.
Details:
She has in iPhone 4 and an iPhone 3Gs
The app crashes on all OSes on BOTH phones
The app crashes with all contacts no matter how they were created
When she sends me her contacts they work fine on both my iPHone 4 and my 3G (not s)
She is the ONLY one that ever gets a crash and it is consistent across both phones and all OSes
She has uninstalled and reinstalled the app and the provisioning profile
She is syncing her iPhone with a windows machine version of iTunes
The crash happens when we use ABPeoplePicker.
From her perspective it looks like the minute she selects a phone number the app crashes.
Of course she is not in our app at that moment. She is in the ABPeoplePicker navigation view provided by Apple.
From the resymbolicated crash log it looks to me like it’s actually crashing when it is trying to return to our app. In other words I can’t find any mention of our app actually being responsible for the crash in the crash log (see below).
It looks like it’s not able to get the index of the selected phone number and then fails when trying to pop back into our app but that’s a guess at best.
I have read the Apple docs and tried to do due diligence in learning about how to read crash logs but I am still stumped.
Here are my questions:
1. Does anyone know what Exception Codes: 0x00000000, 0x00000000 means?
2. Am I correct in assuming that line 9 is where the actual issues is referred to? And if so how do I understand what objc_exception_throw + 64 means?
3. Can anyone shed some light on what this crash log says the problem is?
Incident Identifier:
CrashReporter Key:
Hardware Model: iPhone3,1
Process: My App [471]
Path:
Identifier: My App
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2010-12-06 16:32:44.088 -0600
OS Version: iPhone OS 4.0.2 (8A400)
Report Version: 104
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000, 0x00000000
Crashed Thread: 0
Thread 0 Crashed:
0 libSystem.B.dylib 0x000791d0 __kill + 8
1 libSystem.B.dylib 0x000791c0 kill + 4
2 libSystem.B.dylib 0x000791b2 raise + 10
3 libSystem.B.dylib 0x0008d6fa abort + 50
4 libstdc++.6.dylib 0x00044a20 __gnu_cxx::__verbose_terminate_handler() + 376
5 libobjc.A.dylib 0x000059ec _objc_terminate + 104
6 libstdc++.6.dylib 0x00042df2 __cxxabiv1::__terminate(void (*)()) + 46
7 libstdc++.6.dylib 0x00042e46 std::terminate() + 10
8 libstdc++.6.dylib 0x00042f16 __cxa_throw + 78
9 libobjc.A.dylib 0x000048cc objc_exception_throw + 64
10 CoreFoundation 0x0001fb72 -[__NSArrayI objectAtIndex:] + 154
11 My App 0x00005a68 0x1000 + 19048
12 My App 0x00005dec 0x1000 + 19948
13 UIKit 0x000668f4 -[UIViewController view] + 104
14 UIKit 0x000784e4 -[UIViewController contentScrollView] + 16
15 UIKit 0x00078354 -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 24
16 UIKit 0x00078252 -[UINavigationController _layoutViewController:] + 18
17 UIKit 0x00077d58 -[UINavigationController _startTransition:fromViewController:toViewController:] + 372
18 UIKit 0x00077b68 -[UINavigationController _startDeferredTransitionIfNeeded] + 176
19 UIKit 0x00066fa8 -[UINavigationController pushViewController:transition:forceImmediate:] + 600
20 UIKit 0x00066d40 -[UINavigationController pushViewController:animated:] + 28
21 My App 0x0000a29a 0x1000 + 37530
22 My App 0x0000bcba 0x1000 + 44218
23 AddressBookUI 0x00032cfc -[ABPeoplePickerNavigationController personViewController:shouldPerformDefaultActionForPerson:property:identifier:withMemberCell:] + 152
24 AddressBookUI 0x0003b8ce -[ABPersonViewControllerHelper personTableViewDataSource:selectedPropertyAtIndex:inPropertyGroup:withMemberCell:forEditing:] + 222
25 AddressBookUI 0x0004a17c -[ABPersonTableViewDataSource valueAtIndex:selectedForPropertyGroup:withMemberCell:forEditing:] + 40
26 AddressBookUI 0x00048c00 -[ABPersonTableViewDataSource tableView:didSelectRowAtIndexPath:] + 316
27 UIKit 0x00091f40 -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] + 656
28 UIKit 0x0009db40 -[UITableView _userSelectRowAtIndexPath:] + 124
29 Foundation 0x00086c86 __NSFireDelayedPerform + 362
30 CoreFoundation 0x00071a54 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 8
31 CoreFoundation 0x00073ede __CFRunLoopDoTimer + 854
32 CoreFoundation 0x0007485e __CFRunLoopRun + 1082
33 CoreFoundation 0x0001d8e4 CFRunLoopRunSpecific + 224
34 CoreFoundation 0x0001d7ec CFRunLoopRunInMode + 52
35 GraphicsServices 0x000036e8 GSEventRunModal + 108
36 GraphicsServices 0x00003794 GSEventRun + 56
37 UIKit 0x000062a0 -[UIApplication _run] + 396
38 UIKit 0x00004e10 UIApplicationMain + 664
39 My App 0x0000d694 0x1000 + 50836
40 My App 0x00002d00 0x1000 + 7424
Here is my ABPeoplePicker code.
#pragma mark ABPeoplePickerNavigationControllerDelegate methods
// Displays the information of a selected person
- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person
{
return YES;
}
// Does not allow users to perform default actions such as dialing a phone number, when they select a person property.
- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker
shouldContinueAfterSelectingPerson:(ABRecordRef)person
property:(ABPropertyID)property
identifier:(ABMultiValueIdentifier)identifier {
CFStringRef cfName = ABRecordCopyCompositeName(person);
self.selectedName = [NSString stringWithString:(NSString *)cfName];
CFRelease(cfName);
ABMultiValueRef allThePhoneNums = ABRecordCopyValue(person, kABPersonPhoneProperty);
// ABMultiValueGetIndexForIdentifier the exact value of the "identifier" passed to us.
NSString *number = (NSString *)ABMultiValueCopyValueAtIndex(allThePhoneNums, ABMultiValueGetIndexForIdentifier(allThePhoneNums, identifier));
self.selectedNumber = number;
[number release];
CFRelease(allThePhoneNums);
[self showDialOutToPartViewControllerWithName:self.selectedName andNumber:self.selectedNumber];
[peoplePicker dismissModalViewControllerAnimated:YES];
return NO;
}
// Dismisses the people picker and shows the application when users tap Cancel.
- (void)peoplePickerNavigationControllerDidCancel:(ABPeoplePickerNavigationController *)peoplePicker; {
[self dismissModalViewControllerAnimated:YES];
}

Answer 1

Foremost, it helps to symbolicate your crash logs using the symbolicatecrash tool and the DSYM file that was generated when you compiled it. I won't discuss how to do that here -- you can search Google to find more details; try "symbolicate crash log DSYM" as keywords.
Once you do that, instead of:
My App 0x0232032+433
It will show something like this:
My App [className callSomeMethod:argument]
Much easier to find the line of code that is spawning the problem.
However - note in the stack trace that the last line of code is [array objectAtIndex:] in Foundation. This method will throw an NSRangeException when you pass an index outside of the bounds of the receiver (e.g. array). From the NSArray docs:
If index is beyond the end of the
array (that is, if index is greater
than or equal to the value returned by
count), an NSRangeException is raised.
So, I'd put my money on that being your crash.
Then the question is - after you symbolicate your crash log - what line of your code is calling an array with an out-of-bounds index?