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Description of problem:
In a Hosts -> Create Host dialogue, when RHEV selected as a provider, listing OS images causes traceback when there are no images added to the Compute Resource.

Version-Release number of selected component (if applicable):
Sat6.4 snap4

How reproducible:
Deterministic

Steps to Reproduce:
0. Have some CR and OS with image with that OS in CR
1. Hosts -> Create Host
2. Select Org etc. as necessary
3. Go to Operating System tab
4. Select arch, OS
5. # foreman-tail
6. Select Image-Based

Actual results:
Traceback in production.log

Expected results:
No traceback

Additional info:
I haven't noticed any other problems caused by this. Traceback attached.

Created attachment 1448187 [details]
foreman-tail.log

Created redmine issue http://projects.theforeman.org/issues/23831 from this bug

Upstream bug assigned to orabin

Upstream bug assigned to orabin

Moving this bug to POST for triage into Satellite 6 since the upstream issue http://projects.theforeman.org/issues/23831 has been resolved.

Verified with Sat 6.5 snap 9.

Used reproducer from OP, but with step 0 worded as following: "Have some CR without any image, and have some OS" (because my own wording in OP doesn't make sense to me now)

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:1222