Bug classification

I saw this on IRC this morning in ##hamradio on freenode:

04:21:21 SteveCooling | I've come up with a new classification of software bug                               
04:21:48 SteveCooling | In relation to types such as Heisenbug or Schrödinbug                                
04:22:13 SteveCooling | I now propose to establish "Hindenbug"                                               
04:23:44 SteveCooling | The kind of bug that causes a catastrophic failure rendering the system unusable, and
                      | lowering the confidence in the system to a point where it needs to be decommissioned