diff --git a/src/compiler/transformers/esnext.ts b/src/compiler/transformers/esnext.ts
index a0ab03a973112..db6069fd5ac9f 100644
--- a/src/compiler/transformers/esnext.ts
+++ b/src/compiler/transformers/esnext.ts
@@ -416,7 +416,7 @@ namespace ts {
                             createLogicalNot(getDone)
                         ),
                         /*incrementor*/ undefined,
-                        /*statement*/ convertForOfStatementHead(node, createDownlevelAwait(getValue))
+                        /*statement*/ convertForOfStatementHead(node, getValue)
                     ),
                     /*location*/ node
                 ),
diff --git a/src/harness/unittests/forAwaitOfEvaluation.ts b/src/harness/unittests/forAwaitOfEvaluation.ts
new file mode 100644
index 0000000000000..339e0ca664b9b
--- /dev/null
+++ b/src/harness/unittests/forAwaitOfEvaluation.ts
@@ -0,0 +1,148 @@
+/// <reference path="..\harness.ts" />
+
+namespace ts {
+    declare var Symbol: SymbolConstructor;
+
+    describe("forAwaitOfEvaluation", () => {
+        const sourceFile = vpath.combine(vfs.srcFolder, "source.ts");
+
+        function compile(sourceText: string, options?: CompilerOptions) {
+            const fs = vfs.createFromFileSystem(Harness.IO, /*ignoreCase*/ false);
+            fs.writeFileSync(sourceFile, sourceText);
+            const compilerOptions: CompilerOptions = { target: ScriptTarget.ES5, module: ModuleKind.CommonJS, lib: ["lib.esnext.d.ts"], ...options };
+            const host = new fakes.CompilerHost(fs, compilerOptions);
+            return compiler.compileFiles(host, [sourceFile], compilerOptions);
+        }
+
+        function noRequire(id: string) {
+            throw new Error(`Module '${id}' could not be found.`);
+        }
+
+        // Define a custom "Symbol" constructor to attach missing built-in symbols without
+        // modifying the global "Symbol" constructor
+        // tslint:disable-next-line:variable-name
+        const FakeSymbol: SymbolConstructor = ((description?: string) => Symbol(description)) as any;
+        (<any>FakeSymbol).prototype = Symbol.prototype;
+        for (const key of Object.getOwnPropertyNames(Symbol)) {
+            Object.defineProperty(FakeSymbol, key, Object.getOwnPropertyDescriptor(Symbol, key)!);
+        }
+
+        // Add "asyncIterator" if missing
+        if (!hasProperty(FakeSymbol, "asyncIterator")) Object.defineProperty(FakeSymbol, "asyncIterator", { value: Symbol.for("Symbol.asyncIterator"), configurable: true });
+
+        function evaluate(result: compiler.CompilationResult) {
+            const output = result.getOutput(sourceFile, "js")!;
+            assert.isDefined(output);
+
+            const evaluateText = `(function (module, exports, require, __dirname, __filename, Symbol) { ${output.text} })`;
+            const evaluateThunk = eval(evaluateText) as (module: any, exports: any, require: (id: string) => any, dirname: string, filename: string, symbolConstructor: SymbolConstructor) => void;
+            const module: { exports: any; } = { exports: {} };
+            evaluateThunk(module, module.exports, noRequire, vpath.dirname(output.file), output.file, FakeSymbol);
+            return module;
+        }
+
+        it("sync (es5)", async () => {
+            const module = evaluate(compile(`
+            let i = 0;
+            const iterator = {
+                [Symbol.iterator]() { return this; },
+                next() {
+                    switch (i++) {
+                        case 0: return { value: 1, done: false };
+                        case 1: return { value: Promise.resolve(2), done: false };
+                        case 2: return { value: new Promise<number>(resolve => setTimeout(resolve, 100, 3)), done: false };
+                        default: return { value: undefined: done: true };
+                    }
+                }
+            };
+            export const output: any[] = [];
+            export async function main() {
+                for await (const item of iterator) {
+                    output.push(item);
+                }
+            }`));
+            await module.exports.main();
+            assert.strictEqual(module.exports.output[0], 1);
+            assert.strictEqual(module.exports.output[1], 2);
+            assert.strictEqual(module.exports.output[2], 3);
+        });
+
+        it("sync (es2015)", async () => {
+            const module = evaluate(compile(`
+            let i = 0;
+            const iterator = {
+                [Symbol.iterator]() { return this; },
+                next() {
+                    switch (i++) {
+                        case 0: return { value: 1, done: false };
+                        case 1: return { value: Promise.resolve(2), done: false };
+                        case 2: return { value: new Promise<number>(resolve => setTimeout(resolve, 100, 3)), done: false };
+                        default: return { value: undefined: done: true };
+                    }
+                }
+            };
+            export const output: any[] = [];
+            export async function main() {
+                for await (const item of iterator) {
+                    output.push(item);
+                }
+            }`, { target: ScriptTarget.ES2015 }));
+            await module.exports.main();
+            assert.strictEqual(module.exports.output[0], 1);
+            assert.strictEqual(module.exports.output[1], 2);
+            assert.strictEqual(module.exports.output[2], 3);
+        });
+
+        it("async (es5)", async () => {
+            const module = evaluate(compile(`
+            let i = 0;
+            const iterator = {
+                [Symbol.asyncIterator]() { return this; },
+                async next() {
+                    switch (i++) {
+                        case 0: return { value: 1, done: false };
+                        case 1: return { value: Promise.resolve(2), done: false };
+                        case 2: return { value: new Promise<number>(resolve => setTimeout(resolve, 100, 3)), done: false };
+                        default: return { value: undefined: done: true };
+                    }
+                }
+            };
+            export const output: any[] = [];
+            export async function main() {
+                for await (const item of iterator) {
+                    output.push(item);
+                }
+            }`));
+            await module.exports.main();
+            assert.strictEqual(module.exports.output[0], 1);
+            assert.instanceOf(module.exports.output[1], Promise);
+            assert.instanceOf(module.exports.output[2], Promise);
+        });
+
+        it("async (es2015)", async () => {
+            const module = evaluate(compile(`
+            let i = 0;
+            const iterator = {
+                [Symbol.asyncIterator]() { return this; },
+                async next() {
+                    switch (i++) {
+                        case 0: return { value: 1, done: false };
+                        case 1: return { value: Promise.resolve(2), done: false };
+                        case 2: return { value: new Promise<number>(resolve => setTimeout(resolve, 100, 3)), done: false };
+                        default: return { value: undefined: done: true };
+                    }
+                }
+            };
+            export const output: any[] = [];
+            export async function main() {
+                for await (const item of iterator) {
+                    output.push(item);
+                }
+            }`, { target: ScriptTarget.ES2015 }));
+            await module.exports.main();
+            assert.strictEqual(module.exports.output[0], 1);
+            assert.instanceOf(module.exports.output[1], Promise);
+            assert.instanceOf(module.exports.output[2], Promise);
+        });
+    });
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/emitter.forAwait.es2015.js b/tests/baselines/reference/emitter.forAwait.es2015.js
index 6a29e7fad0a50..6260870471b13 100644
--- a/tests/baselines/reference/emitter.forAwait.es2015.js
+++ b/tests/baselines/reference/emitter.forAwait.es2015.js
@@ -63,7 +63,7 @@ function f1() {
         let y;
         try {
             for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield y_1.next(), !y_1_1.done;) {
-                const x = yield y_1_1.value;
+                const x = y_1_1.value;
             }
         }
         catch (e_1_1) { e_1 = { error: e_1_1 }; }
@@ -97,7 +97,7 @@ function f2() {
         let x, y;
         try {
             for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield y_1.next(), !y_1_1.done;) {
-                x = yield y_1_1.value;
+                x = y_1_1.value;
             }
         }
         catch (e_1_1) { e_1 = { error: e_1_1 }; }
@@ -135,7 +135,7 @@ function f3() {
         let y;
         try {
             for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield __await(y_1.next()), !y_1_1.done;) {
-                const x = yield yield __await(__await(y_1_1.value));
+                const x = y_1_1.value;
             }
         }
         catch (e_1_1) { e_1 = { error: e_1_1 }; }
@@ -173,7 +173,7 @@ function f4() {
         let x, y;
         try {
             for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield __await(y_1.next()), !y_1_1.done;) {
-                x = yield yield __await(__await(y_1_1.value));
+                x = y_1_1.value;
             }
         }
         catch (e_1_1) { e_1 = { error: e_1_1 }; }
@@ -208,7 +208,7 @@ function f5() {
         let y;
         try {
             outer: for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield y_1.next(), !y_1_1.done;) {
-                const x = yield y_1_1.value;
+                const x = y_1_1.value;
                 continue outer;
             }
         }
@@ -248,7 +248,7 @@ function f6() {
         let y;
         try {
             outer: for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield __await(y_1.next()), !y_1_1.done;) {
-                const x = yield yield __await(__await(y_1_1.value));
+                const x = y_1_1.value;
                 continue outer;
             }
         }
diff --git a/tests/baselines/reference/emitter.forAwait.es2017.js b/tests/baselines/reference/emitter.forAwait.es2017.js
index 63e833e81d22d..dd0e8aede2bb8 100644
--- a/tests/baselines/reference/emitter.forAwait.es2017.js
+++ b/tests/baselines/reference/emitter.forAwait.es2017.js
@@ -54,7 +54,7 @@ async function f1() {
     let y;
     try {
         for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = await y_1.next(), !y_1_1.done;) {
-            const x = await y_1_1.value;
+            const x = y_1_1.value;
         }
     }
     catch (e_1_1) { e_1 = { error: e_1_1 }; }
@@ -78,7 +78,7 @@ async function f2() {
     let x, y;
     try {
         for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = await y_1.next(), !y_1_1.done;) {
-            x = await y_1_1.value;
+            x = y_1_1.value;
         }
     }
     catch (e_1_1) { e_1 = { error: e_1_1 }; }
@@ -115,7 +115,7 @@ function f3() {
         let y;
         try {
             for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield __await(y_1.next()), !y_1_1.done;) {
-                const x = yield yield __await(__await(y_1_1.value));
+                const x = y_1_1.value;
             }
         }
         catch (e_1_1) { e_1 = { error: e_1_1 }; }
@@ -153,7 +153,7 @@ function f4() {
         let x, y;
         try {
             for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield __await(y_1.next()), !y_1_1.done;) {
-                x = yield yield __await(__await(y_1_1.value));
+                x = y_1_1.value;
             }
         }
         catch (e_1_1) { e_1 = { error: e_1_1 }; }
@@ -179,7 +179,7 @@ async function f5() {
     let y;
     try {
         outer: for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = await y_1.next(), !y_1_1.done;) {
-            const x = await y_1_1.value;
+            const x = y_1_1.value;
             continue outer;
         }
     }
@@ -218,7 +218,7 @@ function f6() {
         let y;
         try {
             outer: for (var y_1 = __asyncValues(y), y_1_1; y_1_1 = yield __await(y_1.next()), !y_1_1.done;) {
-                const x = yield yield __await(__await(y_1_1.value));
+                const x = y_1_1.value;
                 continue outer;
             }
         }
diff --git a/tests/baselines/reference/emitter.forAwait.es5.js b/tests/baselines/reference/emitter.forAwait.es5.js
index a303b659cb0f7..f264820d3b1f2 100644
--- a/tests/baselines/reference/emitter.forAwait.es5.js
+++ b/tests/baselines/reference/emitter.forAwait.es5.js
@@ -90,35 +90,33 @@ function f1() {
         return __generator(this, function (_b) {
             switch (_b.label) {
                 case 0:
-                    _b.trys.push([0, 6, 7, 12]);
+                    _b.trys.push([0, 5, 6, 11]);
                     y_1 = __asyncValues(y);
                     _b.label = 1;
                 case 1: return [4 /*yield*/, y_1.next()];
                 case 2:
-                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 5];
-                    return [4 /*yield*/, y_1_1.value];
-                case 3:
-                    x = _b.sent();
-                    _b.label = 4;
-                case 4: return [3 /*break*/, 1];
-                case 5: return [3 /*break*/, 12];
-                case 6:
+                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 4];
+                    x = y_1_1.value;
+                    _b.label = 3;
+                case 3: return [3 /*break*/, 1];
+                case 4: return [3 /*break*/, 11];
+                case 5:
                     e_1_1 = _b.sent();
                     e_1 = { error: e_1_1 };
-                    return [3 /*break*/, 12];
-                case 7:
-                    _b.trys.push([7, , 10, 11]);
-                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 9];
+                    return [3 /*break*/, 11];
+                case 6:
+                    _b.trys.push([6, , 9, 10]);
+                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 8];
                     return [4 /*yield*/, _a.call(y_1)];
-                case 8:
+                case 7:
                     _b.sent();
-                    _b.label = 9;
-                case 9: return [3 /*break*/, 11];
-                case 10:
+                    _b.label = 8;
+                case 8: return [3 /*break*/, 10];
+                case 9:
                     if (e_1) throw e_1.error;
                     return [7 /*endfinally*/];
-                case 11: return [7 /*endfinally*/];
-                case 12: return [2 /*return*/];
+                case 10: return [7 /*endfinally*/];
+                case 11: return [2 /*return*/];
             }
         });
     });
@@ -172,35 +170,33 @@ function f2() {
         return __generator(this, function (_b) {
             switch (_b.label) {
                 case 0:
-                    _b.trys.push([0, 6, 7, 12]);
+                    _b.trys.push([0, 5, 6, 11]);
                     y_1 = __asyncValues(y);
                     _b.label = 1;
                 case 1: return [4 /*yield*/, y_1.next()];
                 case 2:
-                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 5];
-                    return [4 /*yield*/, y_1_1.value];
-                case 3:
-                    x = _b.sent();
-                    _b.label = 4;
-                case 4: return [3 /*break*/, 1];
-                case 5: return [3 /*break*/, 12];
-                case 6:
+                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 4];
+                    x = y_1_1.value;
+                    _b.label = 3;
+                case 3: return [3 /*break*/, 1];
+                case 4: return [3 /*break*/, 11];
+                case 5:
                     e_1_1 = _b.sent();
                     e_1 = { error: e_1_1 };
-                    return [3 /*break*/, 12];
-                case 7:
-                    _b.trys.push([7, , 10, 11]);
-                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 9];
+                    return [3 /*break*/, 11];
+                case 6:
+                    _b.trys.push([6, , 9, 10]);
+                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 8];
                     return [4 /*yield*/, _a.call(y_1)];
-                case 8:
+                case 7:
                     _b.sent();
-                    _b.label = 9;
-                case 9: return [3 /*break*/, 11];
-                case 10:
+                    _b.label = 8;
+                case 8: return [3 /*break*/, 10];
+                case 9:
                     if (e_1) throw e_1.error;
                     return [7 /*endfinally*/];
-                case 11: return [7 /*endfinally*/];
-                case 12: return [2 /*return*/];
+                case 10: return [7 /*endfinally*/];
+                case 11: return [2 /*return*/];
             }
         });
     });
@@ -258,36 +254,33 @@ function f3() {
         return __generator(this, function (_b) {
             switch (_b.label) {
                 case 0:
-                    _b.trys.push([0, 7, 8, 13]);
+                    _b.trys.push([0, 5, 6, 11]);
                     y_1 = __asyncValues(y);
                     _b.label = 1;
                 case 1: return [4 /*yield*/, __await(y_1.next())];
                 case 2:
-                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 6];
-                    return [4 /*yield*/, __await(__await(y_1_1.value))];
-                case 3: return [4 /*yield*/, _b.sent()];
-                case 4:
-                    x = _b.sent();
-                    _b.label = 5;
-                case 5: return [3 /*break*/, 1];
-                case 6: return [3 /*break*/, 13];
-                case 7:
+                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 4];
+                    x = y_1_1.value;
+                    _b.label = 3;
+                case 3: return [3 /*break*/, 1];
+                case 4: return [3 /*break*/, 11];
+                case 5:
                     e_1_1 = _b.sent();
                     e_1 = { error: e_1_1 };
-                    return [3 /*break*/, 13];
-                case 8:
-                    _b.trys.push([8, , 11, 12]);
-                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 10];
+                    return [3 /*break*/, 11];
+                case 6:
+                    _b.trys.push([6, , 9, 10]);
+                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 8];
                     return [4 /*yield*/, __await(_a.call(y_1))];
-                case 9:
+                case 7:
                     _b.sent();
-                    _b.label = 10;
-                case 10: return [3 /*break*/, 12];
-                case 11:
+                    _b.label = 8;
+                case 8: return [3 /*break*/, 10];
+                case 9:
                     if (e_1) throw e_1.error;
                     return [7 /*endfinally*/];
-                case 12: return [7 /*endfinally*/];
-                case 13: return [2 /*return*/];
+                case 10: return [7 /*endfinally*/];
+                case 11: return [2 /*return*/];
             }
         });
     });
@@ -345,36 +338,33 @@ function f4() {
         return __generator(this, function (_b) {
             switch (_b.label) {
                 case 0:
-                    _b.trys.push([0, 7, 8, 13]);
+                    _b.trys.push([0, 5, 6, 11]);
                     y_1 = __asyncValues(y);
                     _b.label = 1;
                 case 1: return [4 /*yield*/, __await(y_1.next())];
                 case 2:
-                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 6];
-                    return [4 /*yield*/, __await(__await(y_1_1.value))];
-                case 3: return [4 /*yield*/, _b.sent()];
-                case 4:
-                    x = _b.sent();
-                    _b.label = 5;
-                case 5: return [3 /*break*/, 1];
-                case 6: return [3 /*break*/, 13];
-                case 7:
+                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 4];
+                    x = y_1_1.value;
+                    _b.label = 3;
+                case 3: return [3 /*break*/, 1];
+                case 4: return [3 /*break*/, 11];
+                case 5:
                     e_1_1 = _b.sent();
                     e_1 = { error: e_1_1 };
-                    return [3 /*break*/, 13];
-                case 8:
-                    _b.trys.push([8, , 11, 12]);
-                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 10];
+                    return [3 /*break*/, 11];
+                case 6:
+                    _b.trys.push([6, , 9, 10]);
+                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 8];
                     return [4 /*yield*/, __await(_a.call(y_1))];
-                case 9:
+                case 7:
                     _b.sent();
-                    _b.label = 10;
-                case 10: return [3 /*break*/, 12];
-                case 11:
+                    _b.label = 8;
+                case 8: return [3 /*break*/, 10];
+                case 9:
                     if (e_1) throw e_1.error;
                     return [7 /*endfinally*/];
-                case 12: return [7 /*endfinally*/];
-                case 13: return [2 /*return*/];
+                case 10: return [7 /*endfinally*/];
+                case 11: return [2 /*return*/];
             }
         });
     });
@@ -429,35 +419,33 @@ function f5() {
         return __generator(this, function (_b) {
             switch (_b.label) {
                 case 0:
-                    _b.trys.push([0, 6, 7, 12]);
+                    _b.trys.push([0, 5, 6, 11]);
                     y_1 = __asyncValues(y);
                     _b.label = 1;
                 case 1: return [4 /*yield*/, y_1.next()];
                 case 2:
-                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 5];
-                    return [4 /*yield*/, y_1_1.value];
-                case 3:
-                    x = _b.sent();
-                    return [3 /*break*/, 4];
-                case 4: return [3 /*break*/, 1];
-                case 5: return [3 /*break*/, 12];
-                case 6:
+                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 4];
+                    x = y_1_1.value;
+                    return [3 /*break*/, 3];
+                case 3: return [3 /*break*/, 1];
+                case 4: return [3 /*break*/, 11];
+                case 5:
                     e_1_1 = _b.sent();
                     e_1 = { error: e_1_1 };
-                    return [3 /*break*/, 12];
-                case 7:
-                    _b.trys.push([7, , 10, 11]);
-                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 9];
+                    return [3 /*break*/, 11];
+                case 6:
+                    _b.trys.push([6, , 9, 10]);
+                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 8];
                     return [4 /*yield*/, _a.call(y_1)];
-                case 8:
+                case 7:
                     _b.sent();
-                    _b.label = 9;
-                case 9: return [3 /*break*/, 11];
-                case 10:
+                    _b.label = 8;
+                case 8: return [3 /*break*/, 10];
+                case 9:
                     if (e_1) throw e_1.error;
                     return [7 /*endfinally*/];
-                case 11: return [7 /*endfinally*/];
-                case 12: return [2 /*return*/];
+                case 10: return [7 /*endfinally*/];
+                case 11: return [2 /*return*/];
             }
         });
     });
@@ -516,36 +504,33 @@ function f6() {
         return __generator(this, function (_b) {
             switch (_b.label) {
                 case 0:
-                    _b.trys.push([0, 7, 8, 13]);
+                    _b.trys.push([0, 5, 6, 11]);
                     y_1 = __asyncValues(y);
                     _b.label = 1;
                 case 1: return [4 /*yield*/, __await(y_1.next())];
                 case 2:
-                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 6];
-                    return [4 /*yield*/, __await(__await(y_1_1.value))];
-                case 3: return [4 /*yield*/, _b.sent()];
-                case 4:
-                    x = _b.sent();
-                    return [3 /*break*/, 5];
-                case 5: return [3 /*break*/, 1];
-                case 6: return [3 /*break*/, 13];
-                case 7:
+                    if (!(y_1_1 = _b.sent(), !y_1_1.done)) return [3 /*break*/, 4];
+                    x = y_1_1.value;
+                    return [3 /*break*/, 3];
+                case 3: return [3 /*break*/, 1];
+                case 4: return [3 /*break*/, 11];
+                case 5:
                     e_1_1 = _b.sent();
                     e_1 = { error: e_1_1 };
-                    return [3 /*break*/, 13];
-                case 8:
-                    _b.trys.push([8, , 11, 12]);
-                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 10];
+                    return [3 /*break*/, 11];
+                case 6:
+                    _b.trys.push([6, , 9, 10]);
+                    if (!(y_1_1 && !y_1_1.done && (_a = y_1.return))) return [3 /*break*/, 8];
                     return [4 /*yield*/, __await(_a.call(y_1))];
-                case 9:
+                case 7:
                     _b.sent();
-                    _b.label = 10;
-                case 10: return [3 /*break*/, 12];
-                case 11:
+                    _b.label = 8;
+                case 8: return [3 /*break*/, 10];
+                case 9:
                     if (e_1) throw e_1.error;
                     return [7 /*endfinally*/];
-                case 12: return [7 /*endfinally*/];
-                case 13: return [2 /*return*/];
+                case 10: return [7 /*endfinally*/];
+                case 11: return [2 /*return*/];
             }
         });
     });