Application fail without logs about go-app HOT 6 CLOSED

{
  "name": "Updemia",
  "id": "updemia.client",
  "version": "1.0",
  "build-number": 1,
  "icon": "logo2.png",
  "dev-region": "en",
  "deployment-target": "10.12",
  "copyright": "Copyright © 2017 scullwm. All rights reserved",
  "role": "None",
  "category": "",
  "sandbox": true,
  "capabilities": {
    "network": {
      "in": false,
      "out": true
    },
    "hardware": {
      "camera": false,
      "microphone": false,
      "usb": false,
      "printing": false,
      "bluetooth": false
    },
    "app-data": {
      "contacts": false,
      "location": false,
      "calendar": false
    },
    "file-access": {
      "user-selected": "read-write",
      "downloads": "",
      "pictures": "",
      "music": "",
      "movies": ""
    }
  },
  "store": false,
  "sign-id": "",
  "supported-files": []
}

	f, err := os.OpenFile("client-log.log", os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
	if err != nil {
		log.Fatal(err)
	}

	defer f.Close()
	log.SetOutput(f)