App crashing when adding to Core Data - iphone

Question

Does anyone can tell me what is the source of this crash, because I have no idea what could be wrong. Here the crash log:
Incident Identifier: 517593EA-7CBC-4790-A924-966938AAA01B
CrashReporter Key: 179f2e12142cea96d45f2f6475c7f89a7a702d90
Hardware Model: iPhone1,2
Process: AppName [3579]
Path: /var/mobile/Applications/9FBBBD37-2A31-4240-A8AC-64E5BD0B00C0/AppName.app/AppName
Identifier: AppName
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2011-04-04 15:51:32.466 +0200
OS Version: iPhone OS 4.2.1 (8C148)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000004
Crashed Thread: 9
Thread 0:
0 libSystem.B.dylib 0x35d5b3b0 mach_msg_trap + 20
1 libSystem.B.dylib 0x35d5d894 mach_msg + 60
2 CoreFoundation 0x37521f7c __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x37521780 __CFRunLoopRun + 400
4 CoreFoundation 0x37521504 CFRunLoopRunSpecific + 220
5 CoreFoundation 0x37521412 CFRunLoopRunInMode + 54
6 GraphicsServices 0x33e76d1c GSEventRunModal + 188
7 UIKit 0x3591d574 -[UIApplication _run] + 580
8 UIKit 0x3591a550 UIApplicationMain + 964
9 AppName 0x00002c9a main (main.m:13)
10 AppName 0x00002c64 start + 32
Thread 1:
0 libSystem.B.dylib 0x35d8f974 kevent + 24
1 libSystem.B.dylib 0x35e5e2fc _dispatch_mgr_invoke + 88
2 libSystem.B.dylib 0x35e5dd68 _dispatch_queue_invoke + 96
3 libSystem.B.dylib 0x35e5d788 _dispatch_worker_thread2 + 120
4 libSystem.B.dylib 0x35de6970 _pthread_wqthread + 392
5 libSystem.B.dylib 0x35ddd2fc start_wqthread + 0
Thread 2:
0 libSystem.B.dylib 0x35d5b3b0 mach_msg_trap + 20
1 libSystem.B.dylib 0x35d5d894 mach_msg + 60
2 CoreFoundation 0x37521f7c __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x37521780 __CFRunLoopRun + 400
4 CoreFoundation 0x37521504 CFRunLoopRunSpecific + 220
5 CoreFoundation 0x37521412 CFRunLoopRunInMode + 54
6 WebCore 0x3318bd14 RunWebThread(void*) + 524
7 libSystem.B.dylib 0x35de5b44 _pthread_start + 364
8 libSystem.B.dylib 0x35dd77a4 thread_start + 0
Thread 3:
0 libSystem.B.dylib 0x35de454c __semwait_signal + 24
1 libSystem.B.dylib 0x35d5d198 nanosleep + 120
2 Foundation 0x351e066a +[NSThread sleepForTimeInterval:] + 98
3 AppName 0x00005b40 -[Syncer requestPump] (Syncer.m:116)
4 Foundation 0x3515cb8a -[NSThread main] + 42
5 Foundation 0x35155b90 __NSThread__main__ + 908
6 libSystem.B.dylib 0x35de5b44 _pthread_start + 364
7 libSystem.B.dylib 0x35dd77a4 thread_start + 0
Thread 4:
0 libSystem.B.dylib 0x35d5b3b0 mach_msg_trap + 20
1 libSystem.B.dylib 0x35d5d894 mach_msg + 60
2 CoreFoundation 0x37521f7c __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x37521780 __CFRunLoopRun + 400
4 CoreFoundation 0x37521504 CFRunLoopRunSpecific + 220
5 CoreFoundation 0x37521412 CFRunLoopRunInMode + 54
6 Foundation 0x3517ec4e +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 210
7 Foundation 0x3515cb8a -[NSThread main] + 42
8 Foundation 0x35155b90 __NSThread__main__ + 908
9 libSystem.B.dylib 0x35de5b44 _pthread_start + 364
10 libSystem.B.dylib 0x35dd77a4 thread_start + 0
Thread 5:
0 libSystem.B.dylib 0x35d848d8 select$DARWIN_EXTSN + 20
1 CoreFoundation 0x3755aa34 __CFSocketManager + 356
2 libSystem.B.dylib 0x35de5b44 _pthread_start + 364
3 libSystem.B.dylib 0x35dd77a4 thread_start + 0
Thread 6:
0 libSystem.B.dylib 0x35de72fc __workq_kernreturn + 8
1 libSystem.B.dylib 0x35de6b50 _pthread_wqthread + 872
2 libSystem.B.dylib 0x35ddd2fc start_wqthread + 0
Thread 7:
0 libSystem.B.dylib 0x35de72fc __workq_kernreturn + 8
1 libSystem.B.dylib 0x35de6b50 _pthread_wqthread + 872
2 libSystem.B.dylib 0x35ddd2fc start_wqthread + 0
Thread 8:
0 libSystem.B.dylib 0x35de72fc __workq_kernreturn + 8
1 libSystem.B.dylib 0x35de6b50 _pthread_wqthread + 872
2 libSystem.B.dylib 0x35ddd2fc start_wqthread + 0
Thread 9 Crashed:
0 CoreFoundation 0x374fec60 __CFBasicHashAddValue + 140
1 CoreFoundation 0x374ff8fc CFBasicHashAddValue + 276
2 CoreFoundation 0x3750410a CFSetAddValue + 90
3 CoreFoundation 0x3752be2a -[__NSCFSet addObject:] + 34
4 CoreData 0x34998002 -[NSManagedObjectContext(_NSInternalAdditions) _insertObjectWithGlobalID:globalID:] + 134
5 CoreData 0x34997ec6 -[NSManagedObjectContext insertObject:] + 58
6 CoreData 0x34979cbc -[NSManagedObject initWithEntity:insertIntoManagedObjectContext:] + 248
7 AppName 0x00066512 -[SNServerChanges newItemWithJSONStringFor:withList:] (SNServerChanges.m:655)
8 AppName 0x0006847a -[SNServerChanges requestDidFinishThread:] (SNServerChanges.m:282)
9 AppName 0x00065b28 -[SNServerChanges makeChanges:] (SNServerChanges.m:41)
10 Foundation 0x3515cb8a -[NSThread main] + 42
11 Foundation 0x35155b90 __NSThread__main__ + 908
12 libSystem.B.dylib 0x35de5b44 _pthread_start + 364
13 libSystem.B.dylib 0x35dd77a4 thread_start + 0
Thread 9 crashed with ARM Thread State:
r0: 0x0405ceb0 r1: 0x00000000 r2: 0x00000004 r3: 0x00000001
r4: 0x0405ceb0 r5: 0x002e1c20 r6: 0x00000004 r7: 0x04468884
r8: 0x00000001 r9: 0x044688ac r10: 0x0405ceb0 r11: 0x002bf670
ip: 0x00000000 sp: 0x04468870 lr: 0x34982145 pc: 0x374fec60
cpsr: 0x20000010
One thing I know is the fact that there is something wrong when I try to add new object to Core Data.
This is how I set up Core Data:
- (id) init {
if (self = [super init]) {
NSString* path = [[NSBundle mainBundle] pathForResource:#"Main210" ofType:#"mom"];
NSURL* url = [NSURL fileURLWithPath:path];
url = [[NSURL alloc] initFileURLWithPath:path];
managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:url];
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption, nil];
NSURL *storeUrl = [NSURL fileURLWithPath: [[self applicationDocumentsDirectory] stringByAppendingPathComponent: #"data.bin"]];
NSError *error = nil;
sqlite3_enable_shared_cache(0); // from apple Bug ID# 8055992
persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:options error:&error])
{
NSLog(#"Error: %# \n\n userInfo: %# \n\n ", error, [error userInfo]);
NSError *underlyingError = [[error userInfo] objectForKey:NSUnderlyingErrorKey];
if (underlyingError) {
NSLog(#"Underlying error: %# \n\n userInfo: %# \n\n", underlyingError, [underlyingError userInfo]);
}
NSArray *detailedErrors = [[error userInfo] objectForKey:NSDetailedErrorsKey];
for (NSError *detailError in detailedErrors) {
NSLog(#"Detailed error: %# \n\n userInfo: %# \n\n", detailError, [detailError userInfo]);
}
abort();
}
if (persistentStoreCoordinator != nil) {
managedObjectContext = [[NSManagedObjectContext alloc] init];
[managedObjectContext setPersistentStoreCoordinator: persistentStoreCoordinator];
NSUndoManager *undoManager = [[NSUndoManager alloc] init];
[managedObjectContext setUndoManager:undoManager];
[managedObjectContext setMergePolicy:NSMergeByPropertyObjectTrumpMergePolicy];
}
}
return self;
}
And the function which causes crash:
-(void) newItemWithJSONStringFor:(NSArray*) itemsArray withList:(Lista*) lista {
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
NSNumber *databaseID;
if(LOG==1)NSLog(#"Lista : %#, itemsArrayCount: %d",[lista name], [itemsArray count]);
for (int i=0; i<itemsArray.count; i++) {
[NSThread sleepForTimeInterval:EACHITEMWAITTIME];
NSDictionary* jsonItem = [itemsArray objectAtIndex:i];
databaseID = [jsonItem valueForKey:#"Id"];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Item" inManagedObjectContext:[CoreDataHandler syncContext]];
[request setEntity:entity];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"databaseID == %qi", [databaseID longLongValue]];
[request setPredicate:predicate];
NSError* error;
NSMutableArray *mutableFetchResults = [[[CoreDataHandler syncContext] executeFetchRequest:request error:&error] mutableCopy];
[request release];
BOOL flag = YES; //will item be created?
if (! (mutableFetchResults && [mutableFetchResults count] == 0) ) {
flag = NO;
}
Item* item = [mutableFetchResults lastObject];
if (!item) {
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Item" inManagedObjectContext:[CoreDataHandler syncContext]];
item = [[NSManagedObject alloc] initWithEntity:entity insertIntoManagedObjectContext:[CoreDataHandler syncContext]];
item.databaseID = databaseID;
item.databaseIDSet = [NSNumber numberWithBool:YES];
item.lista = lista;
[mutableFetchResults addObject:item];
}
else {
if(LOG==1)NSLog(#"SNServerChanges - newItemWithJSONString - Modyfing");
}
if(LOG==1)NSLog(#"SNServerChanges - newItemWithJSONString - FillingItem");
// if(LOG==1)NSLog(#"SNServerChanges - newItemWithJSONString - Making new");
//Nazwa
if ([jsonItem valueForKey:#"N"] != [NSNull null])
item.name = [jsonItem valueForKey:#"N"];
//Opis
if ([jsonItem valueForKey:#"D"] != [NSNull null])
item.desc = [jsonItem valueForKey:#"D"];
//Ilosc
if ([jsonItem valueForKey:#"Q"] != [NSNull null])
item.quantity = [jsonItem valueForKey:#"Q"];
//Jednostka
if ([jsonItem valueForKey:#"U"] != [NSNull null])
item.unit = [jsonItem valueForKey:#"U"];
//Checked
if ([jsonItem valueForKey:#"C"] != [NSNull null]){
NSLog(#"SC New : %#, %d",[item fullName], [[item checked] boolValue]);
if(![item.checkedChanged boolValue]){
item.checked = [NSNumber numberWithBool:[[jsonItem valueForKey:#"C"] boolValue]];
}
else
[SyncManager doNextSync];
}
//Pozycja
if ([jsonItem valueForKey:#"O"] != [NSNull null])
item.position = [NSNumber numberWithInt: [[jsonItem valueForKey:#"O"] intValue]];
//Reklama
if([jsonItem valueForKey:#"Adv"]!= nil && [jsonItem valueForKey:#"Adv"]!=[NSNull null]) {
NSDictionary* temp = [jsonItem valueForKey:#"Adv"];
NSString* tempString = [NSString stringWithFormat:#"%#",[temp valueForKey:#"T"]];
item.advert = tempString;
}
//Cena
if ( [jsonItem valueForKey:#"P"] != nil && [jsonItem valueForKey:#"P"]!=[NSNull null])
{
NSObject* obj = [jsonItem valueForKey:#"P"];
item.price=[NSNumber numberWithDouble:[[jsonItem valueForKey:#"P"] doubleValue]];
}
if ([jsonItem valueForKey:#"Pe"] != [NSNull null])
item.priceEstimated = [NSNumber numberWithBool:[[jsonItem valueForKey:#"Pe"] boolValue]];
if ([jsonItem valueForKey:#"Ci"] != [NSNull null])
item.categoryID = [NSNumber numberWithInt: [[jsonItem valueForKey:#"Ci"] intValue]];
if (flag) {
if ( [item.checked boolValue] )
lista.checked = [NSNumber numberWithInt:[lista.checked intValue]+1];
lista.count = [NSNumber numberWithInt:[lista.count intValue]+1];
}
// if(LOG==1)NSLog(#"SNServerChanges - newItemWithJSONString - Fetching");
if(LOG==1)NSLog(#"SNServerChanges - newItemWithJSONString - AddingToItemCache");
if(LOG==1)NSLog(#"\tItem : %#", [item name]);
//[ItemCache processItem: item];
// [(SNServerChanges*)[SNServerChanges sharedInstance] performSelectorOnMainThread:#selector(saveCoreData) withObject:nil waitUntilDone:YES];
if(LOG==1)NSLog(#"SNServerChanges - newItemWithJSONString - ItemAdded");
}
[pool drain];
}

Answer 1

The app is presumably crashing on this line:
item = [[NSManagedObject alloc] initWithEntity:entity insertIntoManagedObjectContext:[CoreDataHandler syncContext]];
You have item defined previously as of class Item but now you are assigning a generic NSManagedObject to it. That is probably the cause of the crash.

Answer 2

I can't see where you've gone wrong (unless there's no Item entity in your model - why not NSLog(#"%#",item);?). I've always used a different call to add a new object, instead of the explicit allocation of an NSManagedObject:
[NSEntityDescription insertNewObjectForEntityForName:#"Item"
inManagedObjectContext:managedObjectContext];
Not sure if it matters.