Tracking down a Zsh history data loss bug

Source: Stapelberg.ch· Michael Stapelberg· August 15, 2026

For many years, I sometimes discovered that commands I was sure I had run were no longer present in my Z shell history file (~/.zsh_history). In this article, I will show you how I tracked down the bug. Spoiler: ultimately, patching Zsh to make it crash loudl…

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