Definition of a "blocker" bug ?

[Jeremy Allison]

Volker and I ended up having an interesting
discussion in a bug report about the meaning
of the term "blocker" as a severity catagory
in bug reports.

I have a definition I'd like to propose -

A "blocker" bug that will prevent a release
is one of the following problems:

Security holes.
Data corruption.
Resource leaks (covers fd's, memory etc.)
Unrecoverable client-visible errors.

Let me know what you think.

Jeremy.