'Segmentation fault' with pthreads and arrary of pointers -

ok, i've hit wall program. using pthreads implement parallel program, have come "segmentation fault" block.

//this in main function //{{{{{ //creates array holds pointers bodies body **bodies = new body*[number_of_bodies];  int bodiesperthread = number_of_bodies / number_of_threads;  //creates array hold pthreads pthread_t threads[number_of_threads];  //here partition array of bodies each thread for(int j = 0; j < number_of_threads; j++)                 {                     if(j == (number_of_threads - 1))                     {                         //create new array hold bodies                         body **subbodies = new body*[bodiesremaining];                          // insert bodies new sub array.                         for(int = nextindex; < bodiesremaining; i++)                             subbodies[i] = bodies[i];                          // launch thread given sub array.                         pthread_create(&threads[j], null, &tree::updatehelp, (void*)subbodies);                     }                     else                     {                         // if not last thread create sub array length equal                         // bodies per thread. update bodies remaining.                         body **subbodies = new body*[bodiesperthread];                         bodiesremaining -= bodiesperthread;                          // populate new array.                         for(int = nextindex; < bodiesperthread; i++)                             subbodies[i] = bodies[i];                          nextindex += bodiesperthread + 1;                          // launch thread given sub array.                         pthread_create(&threads[j], null, &tree::updatehelp, (void*)subbodies);                     }                 }                  for(int = 0; < number_of_threads; i++)                     pthread_join(threads[i], null);        //}}}}     //this in tree.cpp  void* tree::updatehelp(void *bodies) { long tid = pthread_self(); body **subbodies = (body**)bodies;  //according codeblocks debugger fault occuring here cout << "thread " << tid << " has body @ (" << subbodies[0]->x << "," << subbodies[0]->y << ") mass = " << subbodies[0]->mass << ".\n"; pthread_exit(null); } 

i pretty green c++ , cannot life of me figure out why getting error. because have malloc threads? have of body pointers? should create new bodies sub arrays?

thanks in advance!