Corrected "waiting for lock on repository FOO held by BAR" message. BAR was the error number and not the locker name. Use repr on BAR, so problems can be detected easier.

#!/bin/sh

hg init
mkfifo p

hg serve --stdio < p &
P=$!
(echo lock; echo addchangegroup; sleep 5) > p &
Q=$!
sleep 3
kill -HUP $P
wait
ls .hg