code: func (l *State) RawSetInt(index, key int) {
  	l.checkElementCount(1)
  	t := l.indexToValue(index).(*table)
  	t.putAtInt(key, l.stack[l.top-1])
  	l.top--
  }
docs: // RawSetInt does the equivalent of table[n]=v where table is the table at
  // index and v is the value at the top of the stack.
  //
  // This function pops the value from the stack.  The assignment is raw; it
  // doesn't invoke metamethods.
  //
  // http://www.lua.org/manual/5.2/manual.html#lua_rawseti