Created attachment 667088 [details]
anaconda.log

Description of problem:

I have found a reproducible case of anaconda getting stuck. 
One can press ESC to get unstuck, but it can lead to the
twilight zone. :-)

Version-Release number of selected component (if applicable):
smoke9 anaconda 18.37.5

How reproducible:
always

Steps to Reproduce:

0. boot (no kernel parameters) anaconda smoke9 (18.37.5)
1. STORAGE: select sdb (part of a zpool)
2. Do AUTOMATIC PARTITIONING (default scheme:lvm)
4. Do 'Cancel' instead of reclaim space.
5. OK, storage configuration is rejected at the main hub

6. STORAGE: select sdc (part of a zpool)
7. Do AUTOMATIC PARTITIONING (default scheme:lvm)
8. Do AUTOMATIC PARTITIONING (default scheme:lvm)
9. Do 'Cancel' instead of reclaim space.
10. OK, storage configuration is rejected at the main hub

11. STORAGE: select BOTH sdb, sdc (both part of a zpool)
12. Anaconda gets STUCK (gui becomes unresponsive...)

additional issue as a consequence of #12:

13. Hit 'esc' once and 'done'
14. One returns to the main hub with 'automatic partitioning selected'
and 'begin installation' UNLOCKED. Since it is a netinstall, one needs
to wait for SOFTWARE SELECTION to be ready. 

Actual results:
anaconda get stuck. ESC releases but it will be broken.

Expected results:
no gui stuck

Additional info: