RestKit Paginator Crash: Cannot determine hasNextPage: paginator is not loaded - ios

Question

For some reason, I randomly sometimes get this crash.
Fatal Exception: NSInternalInconsistencyException
Cannot determine hasNextPage: paginator is not loaded.
Thread : Fatal Exception: NSInternalInconsistencyException
0 CoreFoundation 0x309a1f4b __exceptionPreprocess + 130
1 libobjc.A.dylib 0x3b1386af objc_exception_throw + 38
2 CoreFoundation 0x309a1e25 +[NSException raise:format:]
3 Foundation 0x31349fe3 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 90
4 Poka 0x004f0f71 -[RKPaginator hasNextPage] (RKPaginator.m:151)
5 Poka 0x00289a41 __66-[PokaLocationContentManagerSingleton fetchLatestPlantsWithCount:]_block_invoke (PokaLocationContentManagerSingleton.m:345)
6 Poka 0x004f2495 __24-[RKPaginator loadPage:]_block_invoke157 (RKPaginator.m:231)
7 Poka 0x004e9355 __66-[RKObjectRequestOperation setCompletionBlockWithSuccess:failure:]_block_invoke244 (RKObjectRequestOperation.m:477)
8 libdispatch.dylib 0x3b61bd1b _dispatch_call_block_and_release + 10
9 libdispatch.dylib 0x3b61bd07 _dispatch_client_callout + 22
10 libdispatch.dylib 0x3b62278d _dispatch_main_queue_callback_4CF$VARIANT$mp + 268
11 CoreFoundation 0x3096c819 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
12 CoreFoundation 0x3096b0ed __CFRunLoopRun + 1300
13 CoreFoundation 0x308d5c27 CFRunLoopRunSpecific + 522
14 CoreFoundation 0x308d5a0b CFRunLoopRunInMode + 106
15 GraphicsServices 0x355c9283 GSEventRunModal + 138
16 UIKit 0x33179049 UIApplicationMain + 1136
17 Poka 0x0006df95 main (main.m:17)
18 libdyld.dylib 0x3b640ab7 start + 2
I am loading the Paginator like this:
- (void)fetchLatestPlantsWithCount:(NSNumber *)count
{
RKObjectManager *objectManager = [RKObjectManager sharedManager];
NSString *requestString = [NSString stringWithFormat:#"/api/rest/plants/?count=%#&limit=:perPage&offset=:offset", count];
NSDictionary *parameters = nil;
if(_dateFilterLastModifiedAppend)
parameters = [[NSDictionary alloc]initWithObjectsAndKeys:_dateFilterLastModifiedAppend, #"last_modified_date__gte", nil];
RKPaginator *paginator = [objectManager paginatorWithPathPattern:requestString parameters:parameters];
paginator.perPage = API_PER_PAGE_LIMIT;
[ZAActivityBar showWithStatus:[NSString stringWithFormat:NSLocalizedStringFromTable(#"Downloading latest plants: %# remaining", #"PokaLocalizable", nil), count]];
[paginator setCompletionBlockWithSuccess:^(RKPaginator *paginator, NSArray *objects, NSUInteger page) {
if([paginator hasNextPage])
{
[ZAActivityBar showWithStatus:[NSString stringWithFormat:NSLocalizedStringFromTable(#"Downloading latest plants: %# remaining", #"PokaLocalizable", nil), [NSNumber numberWithInt:([count integerValue] - paginator.offset)]]];
[paginator loadNextPage];
}
else
{
[self fetchLatestProductionLinesCount];
}
} failure:^(RKPaginator *paginator, NSError *error) {
[self fetchLatestProductionLinesCount];
}];
[paginator loadPage:1];
}
Finally, I added some code to RestKit in order to load the paginator. I don't think it is the problem though.
- (RKPaginator *)paginatorWithPathPattern:(NSString *)pathPattern parameters:(NSDictionary *)parameters
{
NSAssert(self.paginationMapping, #"Cannot instantiate a paginator when `paginationMapping` is nil.");
NSMutableURLRequest *request = [self requestWithMethod:#"GET" path:pathPattern parameters:parameters];
RKPaginator *paginator = [[RKPaginator alloc] initWithRequest:request paginationMapping:self.paginationMapping responseDescriptors:self.responseDescriptors];
#ifdef _COREDATADEFINES_H
paginator.managedObjectContext = self.managedObjectStore.mainQueueManagedObjectContext;
paginator.managedObjectCache = self.managedObjectStore.managedObjectCache;
paginator.fetchRequestBlocks = self.fetchRequestBlocks;
#endif
paginator.operationQueue = self.operationQueue;
Class HTTPOperationClass = [self requestOperationClassForRequest:request fromRegisteredClasses:self.registeredHTTPRequestOperationClasses];
if (HTTPOperationClass) [paginator setHTTPOperationClass:HTTPOperationClass];
return paginator;
}
The only difference is that I pass some parameters to it.
The thing I don't understand is that I load other objects, WITH that same code with the only difference being the type of objects I am downloading. I execute almost that same code right before executing this one, and it works perfectly fine. Hence, my question as to I am confused...
Some more information:
It says the object count is 1, that page is 1, but apparently it is not loaded?
Note that I call the paginator multiple times within the same page. I do the paginator for one type of objects... once it is done I do it for another one... and so on.

Answer 1

All pull requests that I mentioned before were merged already to master. So just use the newest version.
I found an issue and fixed it if you are interested. I posted Pull Request on RestKit github page
https://github.com/RestKit/RestKit/pull/2156
I would recommend to use my fork on branch inventorum where I also cherry picked malloc error fix:
https://github.com/bimusiek/RestKit/commits/inventorum