A maintainer of one of the most important Unix tools ever used Claude to actually ship a release. And it broke absolute path handling. Just let that sink in.
Rsync is that tool that keeps your backup script, deployment pipeline, and mirror infrastructure working silently across millions of servers. A regression entered in a release including AI assisted commits. Though the bug was introduced not by faulty logic auto completed by some AI but by a security hardening patch.
Why rsync isn't just another tool
rsync is a timeless tool. It's the kind of software that works so reliably, you forget it exists. and its delta-transfer algorithm sends only the differences between two sets of files. Every deployment pipeline older than five years probably touches it.
When rsync doesn't do its job, backups stop working without you realizing it. Deployments are not synchronized. Mirrored data is not updated. The blast radius is enormous precisely because the tool is everywhere.
