Anon Log feature broken

[yuri-rage]

Issue details

The log anonymizer feature has been broken since at least the transition to ArduPilot 4.2 (and possibly at some point during 4.1 development). The file is created, but it is unreadable by log analysis tools (screenshot attached with Mission Planner KeyNotFound exception text).

My last successful use of the feature was Sep 2021 with a log from Rover 4.1.0-RC1.

I used to use the feature extensively for sharing with the community and have been remiss in opening the issue here - it has been present for quite some time.

Version

1.3.77 build 1.3.8130.42812

Platform

[x ] All

Airframe type

N/A

Hardware type

N/A

Logs

Any .bin log from a version newer than ArduPilot 4.1 should replicate results.