data structures - Freezing when added to linked list (C) -

my code compiles correctly, when execute, insertlast called twice , program freezes. can't see why work twice freeze up.

the code send nodes linked list:

int main ()     {     linkedlist* canqueue=createlist();      for(ii = 0; ii < 10; ii++)         {         tincan* tempcan = (tincan*) malloc(sizeof(tincan));         insertlast(canqueue, tempcan);         }      return 0;     } 

and linked list methods used:

linkedlist* createlist() /*creates empty linked list*/     {         linkedlist* mylist;         mylist = (linkedlist*)malloc(sizeof(linkedlist));         mylist->head = null;         return mylist;     }    void insertlast(linkedlist* list, tincan *newdata)     {     int ii = 1;     linkedlistnode* newnode = (linkedlistnode*)malloc(sizeof(linkedlistnode));     newnode->data = newdata;     newnode->next = null;          if(list->head == null)             {         list->head = newnode;         newnode->next=null;         }     else         {         linkedlistnode* current = list->head;         while (current->next != null)             {             current = current->next;             }         current->next = newnode;         ii++;          } } 

it kind of looks setting first node it's own neighbour. note working pointers , not copy underlying object.

    list->head = newnode;     newnode->next=null;     current = list->head;     current->next = newnode; 

at start have head newnode current head (current = newnode) current.next = newnode (newnode.next = newnode). because in while loop loop through 1 node forever until exit program.