Description of problem:
This is a fork of bug 870586, see bug 870586 comment 45.

anaconda 18.36 exception report
Traceback (most recent call first):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/devices.py", line 787, in create
    raise DeviceCreateError(str(e), self.name)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/deviceaction.py", line 241, in execute
    self.device.create()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/devicetree.py", line 323, in processActions
    action.execute()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/__init__.py", line 336, in doIt
    self.devicetree.processActions()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/__init__.py", line 174, in turnOnFilesystems
    storage.doIt()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/install.py", line 114, in doInstall
    turnOnFilesystems(storage)
  File "/usr/lib64/python2.7/threading.py", line 504, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 91, in run
    threading.Thread.run(self, *args, **kwargs)
DeviceCreateError: ("Can't have overlapping partitions.", 'vda1')


anaconda-tb is in attachment 658701 [details].


Version-Release number of selected component (if applicable):
anaconda 18.36
smoke4

How reproducible:
probably always

Steps to Reproduce:
1. I had an existing F18 installation on that disk, standard partitions only.
2. I went to manual partitioning.
3. I re-used the existing swap partition in the new layout (by checking "reformat" and "apply").
4. I re-used the existing root partition in the new layout, but I downsized it and mounted it as /home.
5. I deleted the existing /boot from the old system.
6. I created a new / using all the remaining space. I switched it from LVM to a standard partition.
7. Partitioning screen closed OK, but the installation blowed up shortly after Begin Installation.