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'in' operator shouldn't narrow {} originating in unknown

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Anders Hejlsberg
2022-09-02 06:53:56 -07:00
parent 891cdc58aa
commit 908548ef90
1 changed files with 1 additions and 1 deletions
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src/compiler/checker.ts
+1 -1
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@@ -25150,7 +25150,7 @@ namespace ts {
function narrowByInKeyword(type: Type, name: __String, assumeTrue: boolean) {
if (type.flags & TypeFlags.Union
|| type.flags & TypeFlags.Object && declaredType !== type
|| type.flags & TypeFlags.Object && declaredType !== type && !(declaredType === unknownType && isEmptyAnonymousObjectType(type))
|| isThisTypeParameter(type)
|| type.flags & TypeFlags.Intersection && every((type as IntersectionType).types, t => t.symbol !== globalThisSymbol)) {
return filterType(type, t => isTypePresencePossible(t, name, assumeTrue));