Calling fs.statSync with an active mock causes an error in Node 7.7.1

[not-an-aardvark]

Using mock-fs@4.1.0, Node 7.7.1

const mockFs = require('mock-fs');

mockFs({});

fs.statSync('foo')

This returns stats as expected, but then throws an error on the next tick.

Stats { ... }

> TypeError: callback is not a function
    at path/to/mock-fs/lib/binding.js:37:9
    at _combinedTickCallback (internal/process/next_tick.js:73:7)
    at process._tickDomainCallback (internal/process/next_tick.js:128:9)

This is probably caused by nodejs/node#11522.

[straker]

+1. Happens during normal file reading as well. I can't isolate to a particular event, but while looping over a list of files it just errors in the middle.

[not-an-aardvark]

I made a PR to fix this in #198.

[straker]

That fixed my problem. Thanks!

[tschaub]

Fix released in mock-fs@4.2. Thanks @not-an-aardvark.