Steps to reproduce
async function f() {
const { arguments: args } = await { arguments: 42 };
return args;
}
Behavior with typescript@6.0
tsc --target es2015 bug.ts
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
function f() {
return __awaiter(this, void 0, void 0, function* () {
const { arguments: args } = yield { arguments: 42 };
return args;
});
}
Here, await f() correctly produces the value 42.
Behavior with tsgo
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
function f() {
var arguments_1 = arguments;
return __awaiter(this, void 0, void 0, function* () {
const { arguments_1: args } = yield { arguments: 42 };
return args;
});
}
Here, await f() incorrectly produces the value undefined.
Steps to reproduce
Behavior with
typescript@6.0Here,
await f()correctly produces the value42.Behavior with
tsgoHere,
await f()incorrectly produces the valueundefined.