SQLite Upgrade Tests Must Cover Crash Scenarios Between Concurrent Writes

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Desktop apps and edge services can pass standard test suites yet still lose data if a process crashes at a critical moment during write sequences. A August 2026 Antithesis analysis demonstrated this by reproducing a WAL-reset defect in SQLite 3.51.2 and confirming it was resolved in version 3.51.3 using concurrent writes, checkpoints, and explicit invariants. While SQLite's own test harnesses simulate I/O failures and crashes at the library level, application teams must separately verify that their schemas, migrations, and PRAGMA settings survive similar interruptions. Experts recommend wrapping existing CI test commands with fault-injection tooling targeting SQLite WAL behavior, using a custom VFS to observe writes and an external supervisor to simulate process termination. The goal is a compact, reproducible regression artifact — including database files, operation traces, and a minimal failure-reproducing command — that teams can attach to upgrade pull requests and rerun over time.

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