Handle take failure in wait_for_message (ros2#1172)

Signed-off-by: Michel Hidalgo <[email protected]>
KKSTB · Sep 28, 2023 · 5ee7ad4 · 5ee7ad4
1 parent 827d597
commit 5ee7ad4
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/rclpy/rclpy/wait_for_message.py b/rclpy/rclpy/wait_for_message.py
@@ -56,6 +56,7 @@ def wait_for_message(
     if subs_ready:
         if sub.handle.pointer in subs_ready:
             msg_info = sub.handle.take_message(sub.msg_type, sub.raw)
-            return (True, msg_info[0])
+            if msg_info is not None:
+                return (True, msg_info[0])
 
     return (False, None)