Callback was already called.

Hi, I’m using memfs with webpack and its watcher. After rebuild I want to read a file that was just built, but get this error:

    at throwError (C:\...\node_modules\neo-async\async.js:16:11)
    at C:\...\node_modules\neo-async\async.js:2818:7
    at C:\...\node_modules\neo-async\async.js:2830:7
    at done (C:\...\node_modules\neo-async\async.js:3517:9)
    at C:\...\node_modules\webpack\lib\Compiler.js:548:25
    at Immediate.<anonymous> (C:\...\node_modules\memfs\lib\volume.js:684:17)
    at processImmediate (internal/timers.js:456:21)```

[bpatath]

I got this issue too. I think it comes from an error in the Volume.wrapAsync method. Currently, the try block contains both calls to method and callback. Thus, if it is the callback which raises an exception, the callback will be called a second time in the catch block and the Callback was already called. will happen.

Calling the callback should probably be a separated step ensuring that the callback is only called once, e.g.:

let v = null, e = null;
try {
  v = method.apply(...);
} catch (err) {
  e = err;
}
callback(e, v);

[privatenumber]

Hope it’s alright if I work on a fix for this