From 20e84ebcc89b7a0a3d10d15a9c7299fe038635bc Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 19 Oct 2020 09:40:34 +0530
Subject: [PATCH] Ensure valid data written to icon_data on windows

---
 src/calibre/gui2/open_with.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/gui2/open_with.py b/src/calibre/gui2/open_with.py
index 3096ce9c37..91689bf76b 100644
--- a/src/calibre/gui2/open_with.py
+++ b/src/calibre/gui2/open_with.py
@@ -110,7 +110,7 @@ if iswindows:
             data = None
             import traceback
             traceback.print_exc()
-        if data:
+        if isinstance(data, (bytes, bytearray)) or data is None:
             entry['icon_data'] = data
         return entry