Problem running bogoutil -m to remove "singletons"

[Benji Tittle]

I'm trying to purge my database of tokens with counts of 1 or less, and am 
encountering an error of some sort.

I'm using bogoutil-static 0.15.2.  Here's what I'm doing and the output
I get:

----
$ bogoutil-static -d ./wordlist.db -c 1 | wc -l
 131991
$ bogoutil-static -m ./wordlist.db -c 1
(c_get): Successful return: 0
$ bogoutil-static -d ./wordlist.db -c 1 | wc -l
 131991
----

Anyone know what's going on?