From 8b7bdb30388a7937326ce8322047dded1f0b664d Mon Sep 17 00:00:00 2001
From: Vincent Bernat <vincent@bernat.ch>
Date: Tue, 20 Jul 2021 23:20:38 +0200
Subject: [PATCH] i3-companion: don't crash on windows without a class

---
 bin/i3-companion | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/i3-companion b/bin/i3-companion
index 3b2f190..dc09f88 100755
--- a/bin/i3-companion
+++ b/bin/i3-companion
@@ -291,7 +291,7 @@ async def workspace_rename(i3, event):
             if window.sticky:
                 continue
             icon = application_icons.get(
-                window.window_class.lower(), application_icons_nomatch
+                (window.window_class or "").lower(), application_icons_nomatch
             )
             if icon is not None:
                 icons.add(icon)