error.txt

error_log: {
  "name": "TypeError",
  "message": "Cannot read property 'getAttribute' of null",
  "origin": "$r.comet<comet.onmessage>",
  "fatal_level": 0,
  "stack": [
    "create_item@/v2/en-us/-/js/hon_v3/base-app.1971.js:37:15",
    "Object.apply@<anonymous>:17:19",
    "prepare@/v2/en-us/-/js/hon_v3/base-app.1971.js:35:31121",
    "Object.apply@<anonymous>:17:19",
    "constructor@/v2/en-us/-/js/hon_v3/base-app.1971.js:35:30406",
    "constructor@/v2/en-us/-/js/hon_v3/base-app.1971.js:35:29593",
    "constructor.animate_spl@/v2/en-us/-/js/hon_v3/base-app.1971.js:37:14169",
    "constructor.fire@/v2/-/-/js/hon_v3/base-lite.2060.js:1:26771",
    "constructor._fire@/v2/en-us/-/js/hon_v3/base-app.1971.js:34:14169",
    "constructor._proceed_evt@/v2/en-us/-/js/hon_v3/base-app.1971.js:34:15562"
  ],
  "user_id": 227562224,
  "app_version": 3665,
  "app_label": "badoo",
  "deploy_info": "production",
  "app_state": "not_found",
  "state_history": "profile-view",
  "current_url": "https://eu1.badoo.com/not_found",
  "ua": "cr",
  "ua_full": "Chrome 51.0.2704.84",
  "lang": "en-US",
  "images_root": "https://badoocdn.com/aco/eu1.badoo.com"
}

error_log: {
  "name": "TypeError",
  "message": "Cannot convert a Symbol value to a string",
  "origin": "$r.loader<$r.app.static_ready>",
  "fatal_level": 0,
  "stack": [
    "Object.get@<anonymous>:9:56",
    "Object.apply@<anonymous>:17:19",
    "Proxy.fire@/v2/-/-/js/hon_v3/base-lite.2060.js:1:26709",
    "Object.apply@<anonymous>:17:19",
    "ready@/v2/en-us/-/js/hon_v3/base-app.1971.js:35:17471",
    "resourcesReady@/v2/en-us/-/js/hon_v3/base-app.1971.js:35:16540",
    "Object.finish@/v2/-/-/js/hon_v3/base-lite.2060.js:2:19018",
    "Object.static_ready@/v2/-/-/js/hon_v3/base-lite.2060.js:2:18692",
    "Object.e.tryCall@/v2/-/-/js/hon_v3/base-lite.2060.js:1:4387",
    "Object._ready@/v2/-/-/js/hon_v3/base-lite.2060.js:2:15956"
  ],
  "user_id": 227562224,
  "app_version": 3665,
  "app_label": "badoo",
  "deploy_info": "production",
  "app_state": "not_found",
  "state_history": "profile-view",
  "current_url": "https://eu1.badoo.com/not_found",
  "ua": "cr",
  "ua_full": "Chrome 51.0.2704.84",
  "lang": "en-US",
  "images_root": "https://badoocdn.com/aco/eu1.badoo.com"
}

proxy.js

function traceObject(obj, name) {
	obj.___path = name;

	var handler = {
		get: function(target, property, receiver) {
			var response = Reflect.get(target, property, receiver);

			if(response instanceof Object && !(response instanceof Node) && !(response instanceof XMLHttpRequest)){
				response = traceObject(response, target.___path+"."+property);
			}

			return response;
		},
		apply: function(target, thisArg, argumentsList) {
			console.log(target.___path);

			return Reflect.apply(target, thisArg, argumentsList);
		}
	};

	return new Proxy(obj, handler);
}

B = traceObject(B, "B");