Qt 6.8. Client Crashes on "Select Location"

[strseb]

          Hi @strseb 

I am not sure if the purpose of this PR is fix all the problems with Qt6.8, I applied this patch (also this one 9961) to the stable version, and the UI is usable, but one thing is not working, when I click in the list of servers "Select location", the UI crash with the following traceback:

trace.txt

Originally posted by @XavierCLL in #9984 (comment)

[XavierCLL]

I rebuilt the latest stable version with the QT68 patches and this problem is gone. I think it is due to some regressions in QT68 and the Archlinux devs have been applying some fixes to the QT libraries, so I assume that with QT 6.8.1 this will work fine.

[herzenschein]

I was trying the Mozilla VPN app on openSUSE and I got that crash. Then I updated my system and this got fixed.

After checking the backtrace and the openSUSE package for qt6-declarative (since the crash was happening in QtQuick), I managed to find out that the revision that fixed it in openSUSE was this, which adds the upstream fix to https://bugreports.qt.io/browse/QTBUG-129500. It's a well known Qt 6.8 issue, and it matches the backtrace listed here (QQuickItem::mapToItem). If your distro backports the fix to 6.8.0 you'll get it, otherwise I think you should get the fix in 6.8.1.