whitelist prev types to reuse in newOrPrevType
#24899
Merged
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fixes #24898
A type is only overwritten if it is definitely a forward type, partial object (symbol marked
sfForward
) or a magic type. Maybe worse for performance but should be more correct. Another option might be to provide a different value forprev
for thepreserveSym
case but then we cannot easily ignore only nominal type nodes.