Ryan

> I'm going to bring this up at our next team meeting, because I think you aren't wrong, but want to make sure that we think through the potential impacts....

> @SteveMacenski @Ryanf55 > > This issue has been there for a long time? Or just stated failing recently? if you happen know which commit causes this error behavior on...

Sorry, I haven't had time to do this yet. It might be easier for me to just debug this with gdb because a bisect involves recompiling ros2, then nav2, which...

Here's the bisect report: - [ ] 6.0.0 - doesn't compile in rmw_dds_common - [ ] 7.0.0 - doesn't compile in rmw_dds_common ``` /home/ryan/Dev/ros2_rolling/src/ros2/rmw_dds_common/rmw_dds_common/include/rmw_dds_common/qos.hpp:242:3: error: ‘rosidl_type_hash_t’ has not been declared...

@SteveMacenski Does NAV2 CI give you any way to look at test regressions per test to see the first date that test started failing? I know `cdash` has regression reporting...

I would have expected something like this to work, but it doesn't: ```python3 from launch import LaunchService, LaunchDescription from launch.actions import IncludeLaunchDescription from ament_index_python.packages import get_package_share_directory from launch.launch_description_sources import AnyLaunchDescriptionSource...

This one covers reading: https://docs.ros.org/en/rolling/Tutorials/Advanced/Reading-From-A-Bag-File-CPP.html Unfortunately, if the topic name is the wrong topic type than what is attempted to deserialize to, then there is a crash.

Yea. The existing tutorial can be improved to make sure the new code prevents exceptions thrown in RMW by trying to deserialize the wrong message type and making assumptions about...