iphone - MKMapView addAnnotation crashing with EXC_BAD_ACCESS -

hello seeing weird issue, populating own custom annotation mkmapview in loop, after running loop 54 times on 55th times when mkmapview addannotation on line throws exc_bad_access here code

- (void)viewdidload {  [super viewdidload]; [mkmapview setmaptype:mkmaptypestandard]; [mkmapview setzoomenabled:yes]; [mkmapview setshowsuserlocation:yes]; [mkmapview setscrollenabled:yes];  mkcoordinateregion region; region.center.latitude = currentlocation.latitude; region.center.longitude = currentlocation.longitude; mkcoordinatespan span; span.latitudedelta = 0.03; span.longitudedelta = 0.03; region.span = span; [mkmapview setregion:region animated:true];  [mkmapview setdelegate:self];   int =0; for(myobject* myobject in myobjectarray) {     nslog(@"%d", i);     if(i == 55){         nslog(@"%@", myobject);     }     i++;     nsstring *maintitle = myobject.name;     nsstring *subtitle = myobject.address;      cllocationcoordinate2d newcoordinate = { [myobject.latitude doublevalue], [myobject.longitude doublevalue] };     annotation *pinannotation = [[annotation alloc]initwithcoordinate:newcoordinate title:maintitle subtitle:subtitle image:null];     [mkmapview addannotation: pinannotation];     [pinannotation release]; } }   - (void)dealloc { mkmapview.delegate = nil; [mkmapview release]; mkmapview = nil; [myobjectarray release]; myobjectarray = nil; [super dealloc];  } 

here code annotation.h

 @interface annotation : nsobject <mkannotation>{  cllocationcoordinate2d    coordinate;  nsstring * title;  nsstring * subtitle;  uiimage * image;  }   @property (nonatomic, readwrite, assign) cllocationcoordinate2d    coordinate;  @property (nonatomic, retain) nsstring * title;  @property (nonatomic, retain) nsstring * subtitle;  @property (nonatomic, retain) uiimage * image;   - (id) initwithcoordinate:(cllocationcoordinate2d) coordinate title:(nsstring*) title subtitle:(nsstring*) subtitle image:(uiimage*) image;  @end 

here code annotation.m

 - (id) initwithcoordinate:(cllocationcoordinate2d)coordinate title:(nsstring*) title subtitle: (nsstring*) subtitle image:(uiimage*) image{ self = [super init]; if(self){ self.coordinate = coordinate; self.title = title; self.subtitle = subtitle; self.image = image; }  return self; }  -(void) dealloc{ [title release]; [subtitle release]; [image release]; [super dealloc]; } 

here stacktrace

0 myapp 0x00099c6a +[tfcrashhandler backtrace] + 46

1 myapp 0x0009a007 tfsignalhandler + 45

2 libsystem.b.dylib 0x9455345b _sigtramp + 43

3 ??? 0xffffffff 0x0 + 4294967295

4 mapkit 0x015f5124 -[mkquadtrie contains:] + 40

5 mapkit 0x0156363c -[mkannotationcontainerview addannotation:] + 356

6 mapkit 0x01538807 -[mkmapview addannotation:] + 115

make sure annotations you're trying add has sane coordinates, common source of crashes when adding them mkmapview.

latitudes should between -90 , 90 , longitudes should between -180 , 180.