From d8069078f2bbad01a73b72bf2e4ddaf08ca0f585 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ole=20J=C3=B8rgen=20Br=C3=B8nner?= <olejorgenb@yahoo.no>
Date: Sat, 6 Jul 2019 18:29:17 +0200
Subject: [PATCH] Guard against duplicate registerWindow

Seems to happen once and a while (observed on X11 3.28)
---
 tiling.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tiling.js b/tiling.js
index 6f1f2b6..19204de 100644
--- a/tiling.js
+++ b/tiling.js
@@ -1749,6 +1749,10 @@ class Spaces extends Map {
 Signals.addSignalMethods(Spaces.prototype);
 
 function registerWindow(metaWindow) {
+    if (metaWindow.clone) {
+        // Temp workaround - sometimes called twice on enable
+        return false;
+    }
     if (metaWindow.is_override_redirect()) {
         return false;
     }