Question

我在使用node.js（ https://github.com/yortus/asyncawait ）的async / await实现时遇到问题。

在文档中，它说“将包含可用的堆栈跟踪”。但它并没有对我这么做。所以我认为我做错了..但我不知道我做错了什么。

为了演示我将比较“vanilla”bluebird示例的堆栈跟踪与相应的asyncawait代码的相应堆栈跟踪（asyncawait在内部使用bluebird，所以我认为这是公平的。）

首先是没有asyncawait的蓝鸟代码：

var funcB = function() {
  return Promise.resolve().then(function() {
    throw new Error("some err");
  })
};

var funcA = function() {
  return funcB();
};

gulp.task("aa",function(cb) {
  funcA().then(function() {
    cb();
  });
});

堆栈跟踪首先产生信息“funcA - ＆gt; funcB - ＆gt; exception”。没有变得更好！

Error: Error: some err
    at processImmediate [as _immediateCallback] (timers.js:358:17)
From previous event:
    at funcB (C:\projects\JSBuildHelper\JSBuildHelper\tmp\tsreq\app\gulpfile.js:156:30)
    at funcA (C:\projects\JSBuildHelper\JSBuildHelper\tmp\tsreq\app\gulpfile.js:161:12)
    at Gulp.<anonymous> (C:\projects\JSBuildHelper\JSBuildHelper\tmp\tsreq\app\gulpfile.js:164:5)
    at module.exports (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\gulp\node_modules\orchestrator\lib\runTask.js:34:7)
    at Gulp.Orchestrator._runTask (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\gulp\node_modules\orchestrator\index.js:273:3)
    at Gulp.Orchestrator._runStep (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\gulp\node_modules\orchestrator\index.js:214:10)
    at Gulp.Orchestrator.start (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\gulp\node_modules\orchestrator\index.js:134:8)
    at C:\Users\alex\AppData\Roaming\npm\node_modules\gulp\bin\gulp.js:129:20
    at process._tickCallback (node.js:355:11)
    at Function.Module.runMain (module.js:503:11)
    at startup (node.js:129:16)
    at node.js:814:3

现在对应的asyncawait代码：

var funcB = async(function() {
  throw new Error("some err");
});

var funcA = async(function () {
  await(funcB());
});

gulp.task("aa", function(cb) {
  funcA().then(function() {
    cb();
  });
});

在堆栈跟踪中，我只看到异常。没有“funcA”，没有“funcB”。

对于这个简单的程序，这就足够了。但是我不能将它用于其他更复杂的东西，考虑到堆栈实际上有多重要。

Possibly unhandled Error: Error: some err
    at catchBlock (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\asyncawait\src\async\fiberManager.js:51:25)
    at runInFiber (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\asyncawait\src\async\fiberManager.js:29:9)
From previous event:
    at new Promise (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\asyncawait\node_modules\bluebird\js\main\promise.js:84:37)
    at defer (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\asyncawait\src\async\defer.js:6:19)
    at nonIterable (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\asyncawait\src\async\makeAsyncFunc.js:86:28)
    at f0 (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\asyncawait\src\async\makeAsyncFunc.js:119:23)
    at Gulp.<anonymous> (C:\projects\JSBuildHelper\JSBuildHelper\tmp\tsreq\app\gulpfile.js:162:5)
    at module.exports (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\gulp\node_modules\orchestrator\lib\runTask.js:34:7)
    at Gulp.Orchestrator._runTask (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\gulp\node_modules\orchestrator\index.js:273:3)
    at Gulp.Orchestrator._runStep (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\gulp\node_modules\orchestrator\index.js:214:10)
    at Gulp.Orchestrator.start (C:\projects\JSBuildHelper\JSBuildHelper\node_modules\gulp\node_modules\orchestrator\index.js:134:8)
    at C:\Users\alex\AppData\Roaming\npm\node_modules\gulp\bin\gulp.js:129:20
    at Function.Module.runMain (module.js:503:11)
    at startup (node.js:129:16)
    at node.js:814:3

我做错了还是这个限制我无法删除？

asyncawait模块（节点）产生不可用的堆栈跟踪

0 个答案: