memcpy:
	does not behave well with null as both params with size
memmove:
	does not work well with null as both parameters and size
calloc:
	does not work with 0 size
lstlast:
	does not work with basic input
lstclear:
	does not free the list
	does not work with basic input
lstiter: 
	does not work with basic input
lstmap:
	does not work with basic input