Subject: addhardware: Fix backtrace when controller.index is None
From: Cole Robinson crobinso@redhat.com Tue Dec 13 13:49:35 2022 -0500
Date: Tue Dec 13 13:49:35 2022 -0500:
Git: 67832d3097cd6451833c30452d6991896e05933c

When creating a new VM, in the customize wizard we can't depend on
index= value being set (virtinst doesn't do it for example).

For example, this causes a backtrace when adding two virtio-scsi
controllers via the Customize wizard, or adding an extra
virtio-scsi controller to an aarch64 CDROM install.

Reported-by: Charles Arnold <carnold@suse.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>

--- a/virtManager/addhardware.py
+++ b/virtManager/addhardware.py
@@ -1560,7 +1560,7 @@ class vmmAddHardware(vmmGObjectUI):
         controller_num = [x for x in controllers if
                 (x.type == controller_type)]
         if len(controller_num) > 0:
-            index_new = max([x.index for x in controller_num]) + 1
+            index_new = max(int(x.index or 0) for x in controller_num) + 1
             dev.index = index_new
 
         dev.type = controller_type