[Gretl-devel] dialectic gretl: function argument exists and doesn't exist at the same time

Hi, I upgraded to the latest snapshot (Dec 31st) and encountered a strange behavior. Unfortunately I couldn't produce a minimal example. This is in the context of a panel dataset with a sample restriction in place that picks out a single time period. Then a function of mine is called, one of the arguments is a series named "ave_inc_gr", and the corresponding argument name inside the function is "thresh". Now I have the following debug code inside this function, and I report the output as comments: # should give 0, since 'thresh' exists in the function's scope: check = isnull(thresh) # but actually gives 1: print check # but in this very next line, 'thresh' is accepted (no error): string mys = argname(thresh) # and gives the correct passed argument's name "ave_inc_gr": print mys This feels very weird, or am I blind and missing something obvious? Oh BTW, I also noticed something else, I was using isnull() on a panel series and it returned a series instead of an integer. Maybe you could also look into that. thanks, sven