Temporarily revert change

Author: rbuckton

src/compiler/checker.ts

@@ -30840,16 +30840,17 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
                     contextualReturnType = filterType(contextualReturnType, type => !!getIterationTypeOfGeneratorFunctionReturnType(IterationTypeKind.Return, type, isAsyncGenerator));
                 }
                 if (node.asteriskToken) {
-                    const iterationTypes = getIterationTypesOfGeneratorFunctionReturnType(contextualReturnType, isAsyncGenerator);
-                    const yieldType = iterationTypes?.yieldType ?? silentNeverType;
-                    const returnType = getContextualType(node, contextFlags) ?? silentNeverType;
-                    const nextType = iterationTypes?.nextType ?? unknownType;
-                    const generatorType = createGeneratorType(yieldType, returnType, nextType, /*isAsyncGenerator*/ false);
-                    if (isAsyncGenerator) {
-                        const asyncGeneratorType = createGeneratorType(yieldType, returnType, nextType, /*isAsyncGenerator*/ true);
-                        return getUnionType([generatorType, asyncGeneratorType]);
-                    }
-                    return generatorType;
+                    // const iterationTypes = getIterationTypesOfGeneratorFunctionReturnType(contextualReturnType, isAsyncGenerator);
+                    // const yieldType = iterationTypes?.yieldType ?? silentNeverType;
+                    // const returnType = getContextualType(node, contextFlags) ?? silentNeverType;
+                    // const nextType = iterationTypes?.nextType ?? unknownType;
+                    // const generatorType = createGeneratorType(yieldType, returnType, nextType, /*isAsyncGenerator*/ false);
+                    // if (isAsyncGenerator) {
+                    //     const asyncGeneratorType = createGeneratorType(yieldType, returnType, nextType, /*isAsyncGenerator*/ true);
+                    //     return getUnionType([generatorType, asyncGeneratorType]);
+                    // }
+                    // return generatorType;
+                    return contextualReturnType;
                 }
                 return getIterationTypeOfGeneratorFunctionReturnType(IterationTypeKind.Yield, contextualReturnType, isAsyncGenerator);
             }