Comments (6)
That's very strange. I'll take a look.
from typescript.
This is a crash
This is no crash. Crash means the compiler crashes, not you receiving an error.
This changed between versions 5.3.3 and 5.3.4
You probably mean 5.4.3? There is no version 5.3.4.
Excuse my carelessness; I have made revisions.
from typescript.
This is a crash
This is no crash. Crash means the compiler crashes, not you receiving an error.
This changed between versions 5.3.3 and 5.3.4
You probably mean 5.4.3? There is no version 5.3.4.
from typescript.
crossref Will type assertions affect the type narrowing of the subsequent code?
from typescript.
The issue here appears to be inconsistent caching of union and intersection property lookups, specifically the caching logic in getUnionOrIntersectionProperty
and its handling of the skipObjectFunctionPropertyAugment
parameter. It doesn't have anything to do with narrowing.
from typescript.
I see what's happening. For various reasons we have two caches for resolved property lookups on unions and intersections, one that includes property augmentations from Object
and Function
, and one that doesn't. Logic was added in #54753 to propagate entries from the non-augmented cache to the augmented cache (see here), but that's incorrect when properties are marked with CheckFlags.Partial
. I'll put up a PR with a fix.
from typescript.
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