upgrade, .procmailrc funnels to /dev/null

[Willie Gnarlson <willie.gnarlson@gmail.com>]

Hello fellow Debian users,

I upgraded bash on my `testing'  machine tonight and 4 hours passed
before I realize procmail is filtering everything to /dev/null. Right.

Does anyone have any idea why this would be matching on *all* incoming
mail? The offending rule:

----->8-----

#### ==========================
#### Blacklist
#### ==========================
BL=/home/willie/procmail.d/blacklist
:0
* ? (formail -x From: | /bin/fgrep -iqf $BL)
/dev/null

-----8<-----

The contents of $BL is a single line with the following (it is the
actual value, not a made up one):

somebody@example.com

Thanks for any clues!

--
Willie Gnarlson