Compiler: fix a couple of issues with as
, as?
and unions
#7475
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Fixes #5805
Fixes #7441
The first two commits use
.type?
instead of.type
on a couple of nodes because their types might not be computed yet.The third commit makes computing a union's type reactive (make it depend on the inner types, and if they change, recompute) and also use
.type?
instead of.type
because of the same reason as above.