diff --git a/src/compiler/transformers/generators.ts b/src/compiler/transformers/generators.ts index e55cfc76db..d2f2162f45 100644 --- a/src/compiler/transformers/generators.ts +++ b/src/compiler/transformers/generators.ts @@ -1478,7 +1478,7 @@ namespace ts { } const initializer = node.initializer; - if (isVariableDeclarationList(initializer)) { + if (initializer && isVariableDeclarationList(initializer)) { for (const variable of initializer.declarations) { hoistVariableDeclaration(variable.name); } diff --git a/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.js b/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.js new file mode 100644 index 0000000000..10f6c20eb0 --- /dev/null +++ b/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.js @@ -0,0 +1,106 @@ +//// [asyncFunctionWithForStatementNoInitializer.ts] +async function test1() { + let i = 0 + let limit = 10 + for (; i < limit; ++i) { + } +} + +async function test2() { + let i = 0 + let limit = 10 + for (i = 1; i < limit; ++i) { + } +} + +async function test3() { + let i = 0 + for (;; ++i) { + } +} + +async function test4() { + for (;;) { + } +} + +//// [asyncFunctionWithForStatementNoInitializer.js] +var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) { + return new (P || (P = Promise))(function (resolve, reject) { + function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } } + function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } } + function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); } + step((generator = generator.apply(thisArg, _arguments || [])).next()); + }); +}; +var __generator = (this && this.__generator) || function (thisArg, body) { + var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; + return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; + function verb(n) { return function (v) { return step([n, v]); }; } + function step(op) { + if (f) throw new TypeError("Generator is already executing."); + while (_) try { + if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t; + if (y = 0, t) op = [0, t.value]; + switch (op[0]) { + case 0: case 1: t = op; break; + case 4: _.label++; return { value: op[1], done: false }; + case 5: _.label++; y = op[1]; op = [0]; continue; + case 7: op = _.ops.pop(); _.trys.pop(); continue; + default: + if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } + if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } + if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } + if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } + if (t[2]) _.ops.pop(); + _.trys.pop(); continue; + } + op = body.call(thisArg, _); + } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } + if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; + } +}; +function test1() { + return __awaiter(this, void 0, void 0, function () { + var i, limit; + return __generator(this, function (_a) { + i = 0; + limit = 10; + for (; i < limit; ++i) { + } + return [2 /*return*/]; + }); + }); +} +function test2() { + return __awaiter(this, void 0, void 0, function () { + var i, limit; + return __generator(this, function (_a) { + i = 0; + limit = 10; + for (i = 1; i < limit; ++i) { + } + return [2 /*return*/]; + }); + }); +} +function test3() { + return __awaiter(this, void 0, void 0, function () { + var i; + return __generator(this, function (_a) { + i = 0; + for (;; ++i) { + } + return [2 /*return*/]; + }); + }); +} +function test4() { + return __awaiter(this, void 0, void 0, function () { + return __generator(this, function (_a) { + for (;;) { + } + return [2 /*return*/]; + }); + }); +} diff --git a/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.symbols b/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.symbols new file mode 100644 index 0000000000..b8b9e11b8b --- /dev/null +++ b/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.symbols @@ -0,0 +1,51 @@ +=== tests/cases/compiler/asyncFunctionWithForStatementNoInitializer.ts === +async function test1() { +>test1 : Symbol(test1, Decl(asyncFunctionWithForStatementNoInitializer.ts, 0, 0)) + + let i = 0 +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 1, 7)) + + let limit = 10 +>limit : Symbol(limit, Decl(asyncFunctionWithForStatementNoInitializer.ts, 2, 7)) + + for (; i < limit; ++i) { +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 1, 7)) +>limit : Symbol(limit, Decl(asyncFunctionWithForStatementNoInitializer.ts, 2, 7)) +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 1, 7)) + } +} + +async function test2() { +>test2 : Symbol(test2, Decl(asyncFunctionWithForStatementNoInitializer.ts, 5, 1)) + + let i = 0 +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 8, 7)) + + let limit = 10 +>limit : Symbol(limit, Decl(asyncFunctionWithForStatementNoInitializer.ts, 9, 7)) + + for (i = 1; i < limit; ++i) { +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 8, 7)) +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 8, 7)) +>limit : Symbol(limit, Decl(asyncFunctionWithForStatementNoInitializer.ts, 9, 7)) +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 8, 7)) + } +} + +async function test3() { +>test3 : Symbol(test3, Decl(asyncFunctionWithForStatementNoInitializer.ts, 12, 1)) + + let i = 0 +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 15, 7)) + + for (;; ++i) { +>i : Symbol(i, Decl(asyncFunctionWithForStatementNoInitializer.ts, 15, 7)) + } +} + +async function test4() { +>test4 : Symbol(test4, Decl(asyncFunctionWithForStatementNoInitializer.ts, 18, 1)) + + for (;;) { + } +} diff --git a/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.types b/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.types new file mode 100644 index 0000000000..d475f1d2fe --- /dev/null +++ b/tests/baselines/reference/asyncFunctionWithForStatementNoInitializer.types @@ -0,0 +1,63 @@ +=== tests/cases/compiler/asyncFunctionWithForStatementNoInitializer.ts === +async function test1() { +>test1 : () => Promise + + let i = 0 +>i : number +>0 : 0 + + let limit = 10 +>limit : number +>10 : 10 + + for (; i < limit; ++i) { +>i < limit : boolean +>i : number +>limit : number +>++i : number +>i : number + } +} + +async function test2() { +>test2 : () => Promise + + let i = 0 +>i : number +>0 : 0 + + let limit = 10 +>limit : number +>10 : 10 + + for (i = 1; i < limit; ++i) { +>i = 1 : 1 +>i : number +>1 : 1 +>i < limit : boolean +>i : number +>limit : number +>++i : number +>i : number + } +} + +async function test3() { +>test3 : () => Promise + + let i = 0 +>i : number +>0 : 0 + + for (;; ++i) { +>++i : number +>i : number + } +} + +async function test4() { +>test4 : () => Promise + + for (;;) { + } +} diff --git a/tests/cases/compiler/asyncFunctionWithForStatementNoInitializer.ts b/tests/cases/compiler/asyncFunctionWithForStatementNoInitializer.ts new file mode 100644 index 0000000000..45bf3479f5 --- /dev/null +++ b/tests/cases/compiler/asyncFunctionWithForStatementNoInitializer.ts @@ -0,0 +1,24 @@ +async function test1() { + let i = 0 + let limit = 10 + for (; i < limit; ++i) { + } +} + +async function test2() { + let i = 0 + let limit = 10 + for (i = 1; i < limit; ++i) { + } +} + +async function test3() { + let i = 0 + for (;; ++i) { + } +} + +async function test4() { + for (;;) { + } +} \ No newline at end of file