Ubuntu

Comment 2 for bug 647500

Duncan White (d-white) wrote :

Seeing same problem on Ubuntu 11.04 on a few identically configured
machines (lab of 200; problem affected 3!). Appears to be some
corruption in /var/lib/apt-xapian-index.

Cause unknown, but a simple workaround that works for me (on all 3
broken PCs) is:

  rm -rf /var/lib/apt-xapian-index

After this,

  update-apt-xapian-index

completes successfully.