qubes-update-gui: when qube is deleted mid-update, updater succeeds even though it should have failed

[deeplow]

How to file a helpful issue

Qubes OS release

Qubes 4.2

Brief summary

This is a bit of an updater edge-case: I generally run the updater as I start the system and then I start doing other things. I happened to delete one of the qubes which was supposedly being updated and the updater reported succeeding even though it failed to update all qubes other than dom0.

Steps to reproduce

1. start updater
2. delete qube being updated (in this case it was a standalone)

Expected behavior

Several mutually exclusive alternatives:

• it still updates qubes which did not fail
• it informs of failure situation and aborts the entire process

Actual behavior

Indicates update success (100%), even though it failed:

This is the log (the last line was the only output):