Merge pull request #806 from mrfelton/fix/linux-close

fix(wallet): dereference window after closing

app/lib/zap/controller.js

@@ -112,6 +112,12 @@ class ZapController {
         this.mainWindow.hide()
       }
     })
+
+    // Dereference the window object, usually you would store windows in an array if your app supports multi windows,
+    // this is the time when you should delete the corresponding element.
+    this.mainWindow.on('closed', () => {
+      this.mainWindow = null
+    })
   }
 
   // ------------------------------------

app/main.dev.js

@@ -109,7 +109,9 @@ app.on('ready', () => {
       event.preventDefault()
       zap.terminate()
     } else {
-      zap.mainWindow.forceClose = true
+      if (zap.mainWindow) {
+        zap.mainWindow.forceClose = true
+      }
     }
   })