Comment # 2 on bug 1095744 from Stefan Hundhammer

The first backtrace in y2log was this:

2018-06-04 00:27:26 <3> hp460(3701) [Ruby] yast/wfm.rb:253 Client
/mounts/mp_0001/usr/share/YaST2/clients/inst_update_partition.rb
failed with 'Storage::Exception' (Storage::Exception).
Backtrace:

.../lib/y2storage/storage_class_wrapper.rb:260:in `find_by_any_name'
.../lib/y2storage/storage_class_wrapper.rb:260:in `public_send'
.../lib/y2storage/storage_class_wrapper.rb:260:in `forward'
.../lib/y2storage/storage_class_wrapper.rb:212:in `block in
storage_class_forward'
.../lib/y2storage/devicegraph.rb:346:in `find_by_any_name'
.../modules/RootPart.rb:2235:in `fs_by_udev_lookup'
.../modules/RootPart.rb:2217:in `fs_by_devicename'
.../modules/RootPart.rb:2198:in `fstype_for_device'
.../modules/RootPart.rb:288:in `FSCKPartition'
.../modules/RootPart.rb:553:in `FsckAndMount'
.../modules/RootPart.rb:1124:in `block in MountFSTab'
.../vendor_ruby/2.5.0/yast/builtins.rb:83:in `block in foreach'
.../vendor_ruby/2.5.0/yast/builtins.rb:82:in `each'
.../vendor_ruby/2.5.0/yast/builtins.rb:82:in `foreach'
.../modules/RootPart.rb:1109:in `MountFSTab'
.../modules/RootPart.rb:1646:in `MountPartitions'
.../modules/RootPart.rb:2019:in `mount_target'
.../include/update/rootpart.rb:422:in `RootPartitionDialog'
...
...