Assertion causing kernel panic with respawn stanza and post-start/pre-stop

Hi,
We are using Upstart version 0.5.0.
If a job has a respawn stanza and the main process terminates before
post-start script ends, there is a assertion which is causing a kernel
panic.
This does not cause a assertion if the respawn stanza is not present.
Sample Job file:
[/nobackup/spuddupa/ppcroot/nova/etc/init/jobs.d]$ cat job1
console output
respawn
respawn limit 3 20
normal exit 0

pre-start script
  echo "Printing from pre-start script"
end script
script
  echo "Printing from main script"
  # die.sh will sleep for 2 seconds and exit 100
  # The idea is that main process dies before post-start completes.
  exec /etc/init/scripts/die.sh 100 2
end script
post-start script
  echo "Printing from post-start script"
  sleep 5
end script
pre-stop script
   echo "Printing from pre-stop script"
end script
post-stop script
    echo "Printing from post-stop script"
end script

[/nobackup/spuddupa/ppcroot/nova/etc/init/scripts]$ cat die.sh
#!/bin/bash
if [ $# -lt 2 ] ;then
    echo "Correct syntax is $0 RETCODE SLEEPTIME"
    exit 1
fi
retcode=$1
sleeptime=$2
sleep $sleeptime
exit $retcode

Output from /var/log/messages and console are attached
I am working on a fix for this problem. I will send out the patch for review.