Handle take failure in wait_for_message (#1172) (#1174)

Signed-off-by: Michel Hidalgo <[email protected]> (cherry picked from commit 5ee7ad4) Co-authored-by: mhidalgo-bdai <[email protected]>
ros2 · Sep 28, 2023 · e9bd428 · e9bd428
1 parent 236f7c9
commit e9bd428
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)