REPACK CONCURRENTLY can silently drop TOAST updates
A race while building the initial snapshot lets a toast rewrite leave committed column values behind with no error.
By sudo#data-loss
x86 kernel bug dropped dirty bit, silently losing THP data
A pmd_modify() mask error since Linux 6.6 could free rewritten huge pages under reclaim, and Polars users hit it in production.
By kexec