[Gretl-devel] Re: Since when (gretl version) is pass-through of null arguments supported?

Hi function writing experts, in the context of writing (or moderating) function packages I'm wondering when exactly has it become possible to pass through a null argument to a called sub-function? Here's what I mean (adapted from an example by Allin): <hansl> function scalar f2 (bundle b[null]) return 0 end function function scalar f1 (bundle b[null]) eval exists(b) return f2(b) # currently working even if !exists(b) end function # in main (or in some other function) eval f1() </hansl> This is tested and working with a recent snapshot. However, before the year 2023 (I think) the example above would yield an error, because inside the f1 function the object b wouldn't be defined and couldn't be directly passed on to f2. I checked gretl's changelog and couldn't find a related entry, but I know we had some discussions (partly off-list) in 2023 about it. So assuming that this behavior is here to stay, the question is, which gretl version is the minimal one to support it? I'm guessing 2023b or 2023c.