Oct
7th
Sun
7th
HCF - Halt and Catch Fire
A real opcode, used for processor testing back in the day.
I recently discovered an HCF in my calendar system. It was possible to create a subcalendar that was an alias of a remote subcalendar that was an alias of the current calendar. Trying to sync your new subcalendar resulted in an HCF.
As a programmer, I live for those moments.