making the net module usable only after the ready event.

lib/browser/api/net.js

@@ -7,6 +7,7 @@ const Readable = require('stream').Readable
 const binding = process.atomBinding('net')
 const {net, Net} = binding
 const {URLRequest} = net
+const {app} = require('electron')
 
 Object.setPrototypeOf(Net.prototype, EventEmitter.prototype)
 Object.setPrototypeOf(URLRequest.prototype, EventEmitter.prototype)
@@ -106,6 +107,10 @@ class ClientRequest extends EventEmitter {
   constructor (options, callback) {
     super()
 
+    if (!app.isReady()) {
+      throw new Error('net module can only be used after app is ready')
+    }
+
     if (typeof options === 'string') {
       options = url.parse(options)
     } else {