asset library crashes application without any message in log - xcode

Question

That's the log in organizer
ocesses
Name rpages recent_max [reason] (state)
MobileMail 1557 1557 [vm] (resume) (continuous)
MobilePhone 1479 1479 [vm] (resume) (continuous)
tccd 318 320 [vm] (daemon)
Testare 2293 2293 [vm] (frontmost) (resume)
ptpd 1350 1350 (daemon)
dataaccessd 1589 1589 (daemon)
aosnotifyd 512 512 (daemon)
mediaserverd 12077 12077 (daemon)
assetsd 1170 1170 (daemon)
wifid 773 773 (daemon)
iaptransportd 266 266 (daemon)
profiled 592 592 (daemon)
locationd 1373 1373 (daemon)
syslogd 185 185 (daemon)
SpringBoard 7838 7838
backboardd 5776 5776 (daemon)
BTServer 498 498 (daemon)
imagent 668 668 (daemon)
configd 741 741 (daemon)
lockdownd 353 353 (daemon)
powerd 192 192 (daemon)
mDNSResponder 294 294 (daemon)
fairplayd.N42 166 166 (daemon)
UserEventAgent 720 720 (daemon)
securityd 159 160 (daemon)
amfid 219 219 (daemon)
debugserver 0 0 (daemon)
syncdefaultsd 459 459 (daemon)
lockbot 475 475 (daemon)
springboardservi 0 0 (daemon)
CVMServer 89 89 (daemon)
notification_pro 161 161 (daemon)
afcd 157 157 (daemon)
filecoordination 214 214 (daemon)
distnoted 141 141 (daemon)
apsd 438 438 (daemon)
aggregated 109 109 (daemon)
networkd 215 215 (daemon)
fseventsd 277 277 (daemon)
CommCenter 1760 1760 (daemon)
notifyd 226 226 (daemon)
ReportCrash 331 333 (daemon)
**End**
No thread is highlited.
Here is the code
void (^assetEnumerator)(ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger index, BOOL *stop) {
if(result != NULL) {
NSLog(#"See Asset: %#", result);
NSLog(#"Index: %d", index);
ALAssetRepresentation *rep = result.defaultRepresentation;
NSLog(#"URL: %#", rep.url);
UIImage *image = [UIImage imageWithCGImage:rep.fullScreenImage];
[self performSelectorInBackground:#selector(selectImage:) withObject:image];
}
};
void (^assetGroupEnumerator)(ALAssetsGroup *, BOOL *) = ^(ALAssetsGroup *group, BOOL *stop) {
if(group != nil) {
NSLog(#"GRUP Desc:%#",[group valueForProperty:ALAssetsGroupPropertyType]);
NSLog(#"GRUP Desc:%#",group.description);
NSNumber *type = (NSNumber *)[group valueForProperty:ALAssetsGroupPropertyType];
NSLog(#"GRUP Desc:%#",NSStringFromClass([type class]));
int tip = [type intValue];
[group setAssetsFilter:[ALAssetsFilter allPhotos]];
[group enumerateAssetsUsingBlock:assetEnumerator];
}
};
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library enumerateGroupsWithTypes:ALAssetsGroupAll
usingBlock:assetGroupEnumerator
failureBlock: ^(NSError *error) {
NSLog(#"Failure");
}];
It seems like if I don't use this line UIImage *image = [UIImage imageWithCGImage:rep.fullScreenImage]; and the line after is working enumerating
all assets. If I try to get the image or only get the metadata it crashes at some point. The problem is it crashes without XCode showing me the threads or the cause. Nothing is displayed on the left pane. Running it with the profiler shows me a steady 2MB usage of the application. It doesn't seem to have memory leaks.
I tried different approaches but still crashes without any error message.