Fix check in isMappedTypeGenericIndexedAccess

microsoft · Jun 1, 2022 · d347d87 · d347d87
1 parent 9031497
commit d347d87
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -12308,7 +12308,7 @@ namespace ts {
             let objectType;
             return !!(type.flags & TypeFlags.IndexedAccess && getObjectFlags(objectType = (type as IndexedAccessType).objectType) & ObjectFlags.Mapped &&
                 !isGenericMappedType(objectType) && isGenericIndexType((type as IndexedAccessType).indexType) &&
-                !(objectType as MappedType).declaration.questionToken && !(objectType as MappedType).declaration.nameType);
+                !(getMappedTypeModifiers(objectType as MappedType) & MappedTypeModifiers.ExcludeOptional) && !(objectType as MappedType).declaration.nameType);
         }
 
         /**