unpack behaviour in 5.1

[Mark Melling <mark.melling@...>]

Hi,

At least from my perspective unpack seems to behave strangely when dealing with nils - as you can see from the output below. 

Is this expected behaviour? 

How can I get unpack({nil,2,nil}) to return nil,2?

> print(unpack({nil,2}))

nil 2

> print(unpack({nil,2,nil}))

> print(unpack({nil,2,3,nil}))

nil 2 3

Thanks

Mark