[16:03:44] <apine>	 Hello, all! There have been a lot of bugs lately about type-conversion of lists when those lists declare their type as `Z881(Z1)`. More context on this task: https://phabricator.wikimedia.org/T395464. The upshot is that, for now, you can use `Z18475` to "type-cast" lists (when their elements are of a homogeneous type). In the coming months, we plan to put some more work into making type conversion nicer.
[16:04:02] <apine>	 A question for you all: is there another place where these kinds of dark magic tricks should be documented?
[17:22:14] <wm-bb>	 <Al> For now, we have some guidance at https://www.wikifunctions.org/wiki/Wikifunctions:Catalogue/List_operations#Functions_with_list_outputs (re @wmtelegram_bot: <apine> A question for you all: is there another place where these kinds of dark magic tricks should be documented?)
[19:48:57] <apine>	 Thank you! (re @<Al> For now, we have some guidance ...)
[23:20:37] <wm-bb>	 <David> Thanks; I'm also encountering this issue. I've created a place for discussion at Wikifunctions:Project_chat#Indicating_unknown_day/month_values_in_Day_of_Roman_Year (https://www.wikifunctions.org/wiki/Wikifunctions:Project_chat#Indicating_unknown_day/month_values_in_Day_of_Roman_Year) (re @dvd_ccc27919: The Gregorian calendar date type doesn't support an unknown day,
[23:20:37] <wm-bb>	 so this fea <clipped message>
[23:20:38] <wm-bb>	 <David> ture is impossible)