Postmortem for Kernel Soundness Bug #14576 — Leonardo de Moura
- 2026-08-01 A soundness bug in the Lean kernel (#14576) was reported and fixed during the week of July 27.
- It has had visibility on Zulip and social media (e.g., X, LinkedIn, and Mastodon).
- What happened On July 25, Ramana Kumar published a repository containing a sorry-free "disproof" of the Collatz conjecture, produced with AI assistance.
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- 2026-08-01 A soundness bug in the Lean kernel (#14576) was reported and fixed during the week of July 27.
- It has had visibility on Zulip and social media (e.g., X, LinkedIn, and Mastodon).
- What happened On July 25, Ramana Kumar published a repository containing a sorry-free "disproof" of the Collatz conjecture, produced with AI assistance.
Sources: Github