Did Claude increase bugs in rsync?

In late May 2026, an unsubstantiated Mastodon post alleged that Claude-assisted commits in rsync caused regressions, sparking widespread outrage across social media and Hacker News despite lacking evidence. The author conducted a rigorous statistical analysis with methodology validated by a statistician to investigate whether Claude contributions actually increased bugs in rsync, using automated data collection and analysis to avoid hallucinations or manipulation. The analysis found no substantive support for the correlation claimed in the initial viral post.