Created attachment 633628 [details]
Contents of /var/log/YaST2 after failed DVD installation

The installation from DVD media
(openSUSE-Tumbleweed-DVD-x86_64-Snapshot20150505-Media.iso) fails with the
following error:

  Error

  Internal error. Please report a bug report with logs.
  Details: undefined method `map' for nil:NilClass
  Caller:  /mounts/mp_0001/usr/share/YaST2/modules/BootStorage.rb:157:in `block
in InitDiskInfo'

I installed with default options. The last screen starts with "Installation
Settings" and "Analyzing your system".

The disk layout of the former OS (separate /boot, encrypted root with RAID5
without LVM on three disks) is impossible with current openSUSE, but works with
Fedora 21. openSUSE installations suggests to delete Fedora partitions but
fails.

Contents of /var/log/YaST2 and a file with disk layout information is attached.