Created attachment 105932 [details]
Discover backtrace

5.8.7 on neon LTS 5.8

Steps:
Check for Updates (10 updates available in my case)
Update All

An ambiguous message box appears with the title "Remove..." and the text "libkpmcore4 (3.0.3-0neon+16.04+build5)", presumably asking whether to remove this package?
When I click 'No' on the message box, Discover seg faulted and crashed (backtrace attached).

Trying to reproduce, but now when clicking no, it doesn't segfault but it shows "Loading..." and "Updating..." then kicks me back to the updates list without actually asking for admin authentication and updating.

There are two main issues here:
1. The message box isn't exactly clear what is being asked of the user. Presumably it is asking whether to remove the specified package.
2. Behaviour after clicking 'No' on the message box is unexpected; either crashing or showing "Updating..." when it is not actually updating the packages.