From 3a3f9aa008e709e0a3c3535434efffb0231e4279 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Thu, 18 Apr 2019 15:50:21 -0500
Subject: [PATCH] CyclerPopup: Check for type using constructor

Classes that are sub-classes of GObject don't use a constructor per se, so we
can't check for new.target (as this is undefined) in _init.

Then compare the current constructor name instead.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/503
---
 js/ui/altTab.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/js/ui/altTab.js b/js/ui/altTab.js
index fb9c875c8..0212992be 100644
--- a/js/ui/altTab.js
+++ b/js/ui/altTab.js
@@ -477,8 +477,8 @@ var CyclerList = GObject.registerClass({
 var CyclerPopup = GObject.registerClass(
 class CyclerPopup extends SwitcherPopup.SwitcherPopup {
     _init() {
-        if (new.target === CyclerPopup)
-            throw new TypeError('Cannot instantiate abstract class ' + new.target.name);
+        if (this.constructor.name === CyclerPopup.prototype.constructor.name)
+            throw new TypeError(`Cannot instantiate abstract class ${this.constructor.name}`);
 
         super._init();