Comment 26 for bug 68267

the bug seems to be cause by:
---
while :; do
  run db_input low x11-common/xwrapper/nice_value
  # is the question going to be asked?
  if [ $? -eq 30 ]; then
    break # no; bail out of validation loop
  fi
---
$? is 0, the result of run rather than the result of db_input
removing run seems to give better results

But where is run define, what it does and why it is used, I don't know.