Comment 1 for bug 94657

Exit code 139 is a segmentation fault; the only real way that can happen in this particular context is if there's been a problem reading from the CD. This is generally due to a faulty CD/DVD disk or drive, rather than being an installer bug as such. It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed, or to clean the CD/DVD drive lens (cleaning kits are often available from electronics suppliers).