ios - Thread 1 exc_bad_access Error -


i developing ios app , working google maps. drawing lines on map, add coordinates in mutablearray, save coordinate in nsuserdefault works perfectly. when getting data nsuserdefault , showing coordinates on google maps not work. in gmsmutablepath, app crashes following error message : exec_bad_access (code=1,address=0*4). any idea why?

here related code:
getting data

nsuserdefaults *defaults=[nsuserdefaults standarduserdefaults]; nsarray *coordinatearray = [defaults objectforkey:@"numberarray"]; nslog(@"%@",coordinatearray  (int = 0; < [coordinatearray count]; i++) {     nsdictionary *dic = [coordinatearray objectatindex:i];     nsstring *lat = [dic valueforkey:@"lat"];     nsstring *longitude = [dic valueforkey:@"long"];     _valuepoints.latitude = [lat doublevalue];     _valuepoints.longitude = [longitude doublevalue];     gmsmutablepath *path = [[gmsmutablepath alloc] initwithpath:self.polyline.path];     [path addcoordinate:_valuepoints];     self.polyline.path = path; }


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