I believe this to be fixed by the 1.2.24 package I uploaded earlier today. The problem came down to lack of swap support on the machine(s) on which the tests were running. /proc/swaps doesn't exist on such a machine, and growlight thus aborted in startup. Growlight is now resistant to this class of issues. I expect 1.2.24 to fix this, but won't be sure until it runs.
-- nick black -=- https://www.nick-black.com to make an apple pie from scratch, you need first invent a universe.