Intermittent crash in `rqt_bag` when saving recording (ROS 2 Kilted Kaiju pre-release)

[aehils]

Further from RQT Issue #437

Description

During testing of rqt_bag in ROS 2 Kilted Kaiku pre-release, the application crashed upon attempting to save a bag file after recording. The crash occurred on the first attempt but could not be reproduced after relaunching RQT.

Steps Taken

1. Launched dummy robot topics:

ros2 launch dummy_robot_bringup dummy_robot_bring_up_launch.py

2. Opened RQT using rqt command.
3. Within the RQT window, selected 'Plugins > Logging > Bag'.
4. Click "Record" and selected all topics.
5. Crash occurred when attempting to 'Save Bag' - files were not saved.

Expected Behaviour

Bag recording saves successfully to local machine without crashes.

Environment

PLATFORM INFORMATION
system : Linux
platform info : Linux-6.8.0-59-generic-aarch64-with-glibc2.39
release : 6.8.0-59-generic
processor : aarch64

RMW MIDDLEWARE
middleware name : rmw_connextdds

ROS 2 INFORMATION
distribution name : kilted
distribution type : ros2
distribution status : pre-release
release platforms : {'debian': ['bookworm'], 'rhel': ['9'], 'ubuntu': ['noble']}

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 24.04.2 LTS
Release:	24.04
Codename:	noble

Notes

• Could not reproduce after relaunching.
• No error logs were saved, but future testers can check for core dumps or ~/.ros/log/.