https://landow.dev/tags/go/ Recent content in Go on Steven's blog Hugo -- 0.152.2 en Tue, 13 Jan 2026 00:00:00 +0000 https://landow.dev/posts/go-deadlocks/ Tue, 13 Jan 2026 00:00:00 +0000 https://landow.dev/posts/go-deadlocks/ <p><strong>UPDATE:</strong> I made this into a small Go module: <a href="https://github.com/stevenctl/deadlog">https://github.com/stevenctl/deadlog</a>. It is a drop in replacement for <code>sync.Mutex</code> and <code>sync.RWMutex</code>, with the option to call the returned <code>unlock</code> closure if you want to track unreleased locks. Don&rsquo;t run with this in production, it&rsquo;s only for debugging deadlocks.</p> <p>Multiple times, I&rsquo;ve had to debug deadlocks in some Go code. Even though Go&rsquo;s <code>-race</code> flag when running tests can detect deadlocks, in my experience it hasn&rsquo;t caught the ones that drive me crazy with flaky or fast tests (~500ms-2s).</p>