c - Deletion in singly linked list -

i have function deletenode() deleting node linked list. func. called in main func. deletenode(&head, 10);, head pointer first node of linked list , 10 value deleted.

here, else if statement commented , function runs fine. when uncomment else if statement , run program crashes. why happening , solution?

void deletenode(node **h, int value) {     node *current, *temp;     current = *h;      while(current != null)     {         // if node deleted first node of list         if(current == *h && current->data == value)             {             *h = current->next;         }         /*         // if node deleted other first node         else if(current->next->data == value)         {             temp = current->next;             current->next = temp->next;             free(temp);         } */         current = current->next;     }                   } 

because you're trying access current->next->data without checking if current->next null first. should modify logic either check if current->next != null before trying access data, or check current->data , remove saving previous node also.