"is not null" doesn't seem to be doing the same type inference "!= null" does.

[DDR0]

https://discord.com/channels/225816341737766912/957180642037202986/1071643217637949441

So if you have a
if (me_base_card is not null and new_base_card is not null,
set(new_base_card.portrait, me_base_card.portrait)
) where me_base_card = me.base_card
where new_base_card = new_creature.base_card

And base_card is a map|null type, shouldn't the if statement signal to the engine that it's me_base_card and new_base_card can only be map and not null within the if statement?

LaserCat — Yesterday at 20:01
if (me_base_card is not null and new_base_card is not null,
set(new_base_card.portrait, me_base_card.portrait)
) where me_base_card = me.base_card
where new_base_card = new_creature.base_card
[20:01]
for easier reading ^

Touhou Project　東方プロジェクト — Yesterday at 20:07
OK so "is not null" doesn't work but "!= null" does

[DDR0]

Probable duplicate of #273 and #6.