Lookup in both cache if not skipObjectFunctionPropertyAugment

Author: sheetalkamat

src/compiler/checker.ts

@@ -10997,15 +10997,15 @@ namespace ts {
         // these partial properties when identifying discriminant properties, but otherwise they are filtered out
         // and do not appear to be present in the union type.
         function getUnionOrIntersectionProperty(type: UnionOrIntersectionType, name: __String, skipObjectFunctionPropertyAugment?: boolean): Symbol | undefined {
-            const properties = skipObjectFunctionPropertyAugment ?
-                type.propertyCacheWithoutObjectFunctionPropertyAugment ||= createSymbolTable() :
-                type.propertyCache ||= createSymbolTable();
-            let property = properties.get(name);
-            if (!property) {
-                property = createUnionOrIntersectionProperty(type, name, skipObjectFunctionPropertyAugment);
-                if (property) {
-                    properties.set(name, property);
-                }
+            let property = type.propertyCacheWithoutObjectFunctionPropertyAugment?.get(name) ||
+                !skipObjectFunctionPropertyAugment ? type.propertyCache?.get(name) : undefined;
+            if (property) return property;
+            property = createUnionOrIntersectionProperty(type, name, skipObjectFunctionPropertyAugment);
+            if (property) {
+                const properties = skipObjectFunctionPropertyAugment ?
+                    type.propertyCacheWithoutObjectFunctionPropertyAugment ||= createSymbolTable() :
+                    type.propertyCache ||= createSymbolTable();
+                properties.set(name, property);
             }
             return property;
         }