From d92939135f22dd2844ce9f63b5494385f2f0051a Mon Sep 17 00:00:00 2001
From: "Peter F. Patel-Schneider" <pfpschneider@gmail.com>
Date: Sun, 1 Nov 2020 08:54:26 -0500
Subject: [PATCH] device: warn when feature notifiation comes in before device
 fully set up

---
 lib/logitech_receiver/notifications.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/logitech_receiver/notifications.py b/lib/logitech_receiver/notifications.py
index a0401840..c0c97f4d 100644
--- a/lib/logitech_receiver/notifications.py
+++ b/lib/logitech_receiver/notifications.py
@@ -125,7 +125,9 @@ def _process_device_notification(device, status, n):
         return _process_hidpp10_custom_notification(device, status, n)
 
     # assuming 0x00 to 0x3F are feature (HID++ 2.0) notifications
-    assert device.features
+    if not device.features:
+        _log.warn('%s: feature notification but features not set up: %02X %s', device, n.sub_id, n)
+        return False
     try:
         feature = device.features[n.sub_id]
     except IndexError: