crash when pasting a hex colour value to compose color dialog

pd-l2ork version 20170108 on ubuntu 14.04

to repro:

open or create pd-l2ork file
make or put a color-able object (bang, toggle, slider, canvas)
right click the object -> Properties -> Compose Color
copy a hex color from somewhere (without leading #)
select the object's current hex value (without #) and hit ctrl-v