eMMC Failed. Why?

I often enjoy posting a “bug-of-the week” on X . Following a recent bug post , someone asked me how I found such bugs: So I thought I might share the following story, in illustration of how a bug can be found. It started a couple weeks ago, when a friend recently pointed me to an Open Source eMMC controller posted by Lattice Semiconductor on GitHub . He asked me for my thoughts. My first response…