Crashes with trace/breakpoint trap

[Aaron Rainbolt]

OS: Lubuntu Oracular beta release candidate

Steps to reproduce:

* Install Lubuntu
* `sudo apt install falkon`
* Run `falkon`

Expected result: Falkon launches

Actual result: Two errors about being unable to execvp to /usr/lib/qt6/libexec/QtWebEngineProcess, then a trace/breakpoint trap crash. Very similar to https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2046844

Additional info: Issue cannot be bypassed by turning off user namespace restrictions in AppArmor following the directions at https://discourse.ubuntu.com/t/ubuntu-24-04-lts-noble-numbat-release-notes/39890#unprivileged-user-namespace-restrictions, using QTWEBENGINE_DISABLE_SANDBOX=1 environment variable results in Falkon's window *appearing* but no content being able to render (and coincidentally Falkon then repeatedly steals focus from any other window and you have to right-click it in the panel and close it to get it to stop).

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/2081228

[KDE (kde-community)]

Uploaded a few days ago, but it is stuck. Added this bug, maybe it will help.