Unexpected error with numbers

[porglezomp]

Typing even just pa into the web interface at http://www.lojban.org/jboski/index.php causes an unexpected error

[lagleki]

related to https://github.com/christiank/jbofihe/commit/bf4cd5141ca73ea4a78efcbba6e516a3c9f4305e

[kseistrup]

It happens with all numbers:

$ echo no | jbofihe -x -b

------------------------------------------------------------------
An unexpected error has occurred whilst running jbofihe.

Please submit a report on https://github.com/lojban/jbofihe/issues
with at least these pieces of information:
  Version of jbofihe (jbofihe -v)
  Command line options
  The input text
------------------------------------------------------------------
$ jbofihe -v
jbofihe version 0.40