update-grub stalls at user input

Binary package hint: grub

After a clean install of 8.04 x86 Alpha 5 (without bootloader), I installed the grub package. When I run "sudo update-grub", I get the following output:

Searching for GRUB installation directory ... found: /boot/grub
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ...

Could not find /boot/grub/menu.lst file. Would you like /boot/grub/menu.lst generated for you? (y/N)

The script stalls at this point. No matter what I type, the script just stalls there. Looking at the script, the problem area is here:

  echo -n "Would you like $menu_file generated for you? " >&2
  echo -n "(y/N) " >&2
  read answer

I created a short script to reproduce the problem, and it seems that the problem stems from:

. /usr/share/debconf/confmodule

Here's the sample script that reproduces the stalling:

#!/bin/bash
. /usr/share/debconf/confmodule
read answer
echo $answer

I don't know why confmodule is causing this.

The workaround is invoke update-grub with "-y".