So my systems recently updated to rsync 3.4.3, and as soon as that happened my backup system - which does incremental backups using multiple --compare-dest= arguments - started to fail on anything but a full backup.

Revert to 3.4.1 and it works.

So I go look at the source in GitHub to see what might have changed, because there doesn't seem to be anything relevant in the changelog.

Since 3.4.1, 36 commits by "tridge and claude"

Oh for fuck's sakes.

@JeremiahFieldhaven Christ if it’s coming for rsync of all things software is clearly done
@sinbad @JeremiahFieldhaven What an idiotic thing to do to a piece of software with a venerable past and whose key feature is its reliability. All these OSS maintainers just burning decades of trust over a perceived 10-ish % “efficiency gain” with snowballing amounts of evidence to the contrary, and a looming bubble implosion on the horizon.
@distractal @sinbad @JeremiahFieldhaven Though I'm not sure how much the 10-ish % "efficiency gain" is when I can ask an agent to solve a problem for me in 5-15 minutes, or I can spend literally hours poring over a code base to understand what I need to do to fix it myself.
@chris @distractal @sinbad @JeremiahFieldhaven you can ask all you want, that's for sure