texstudio crashes on options save

[linderd]

Environment

• TeXstudio: 2.12.22
• Qt: 5.13.2
• OS: Fedora 32 (kernel 5.6.12)
• TeX distribution: texlive

Expected behavior

Trying to save Options (I don't even have to change something)

Actual behavior

Crashes in the moment when I click OK in Options

How to reproduce

• install texstudio from dnf
• open options
• click OK

Working with a normal LaTeX-File actually works, I just wanted to change from bibtex to biber.

I already backtraced the segmentation fault:

gdb texstudio
GNU gdb (GDB) Fedora 9.1-5.fc32
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Type "show copying" and "show warranty" for details.
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Type "show configuration" for configuration details.
For bug reporting instructions, please see:
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For help, type "help".
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Reading symbols from texstudio...
Reading symbols from .gnu_debugdata for /usr/bin/texstudio...
(No debugging symbols found in .gnu_debugdata for /usr/bin/texstudio)
Missing separate debuginfos, use: dnf debuginfo-install texstudio-2.12.22-2.fc32.x86_64
(gdb) 
(gdb) backtrace
No stack.
(gdb) run
Starting program: /usr/bin/texstudio 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7fffe5ca7700 (LWP 25063)]
QSocketNotifier: Can only be used with threads started with QThread
[New Thread 0x7fffdffff700 (LWP 25064)]
[New Thread 0x7fffdf7fe700 (LWP 25065)]
[New Thread 0x7fffdeffd700 (LWP 25066)]
[New Thread 0x7fffde7fc700 (LWP 25067)]
[New Thread 0x7fffcffff700 (LWP 25068)]
[New Thread 0x7fffceff9700 (LWP 25069)]
[New Thread 0x7fffce7f8700 (LWP 25070)]
[New Thread 0x7fffcdff7700 (LWP 25071)]
[New Thread 0x7fffcd7f6700 (LWP 25072)]
[New Thread 0x7fffccff5700 (LWP 25073)]
[New Thread 0x7fffc329d700 (LWP 25074)]
[New Thread 0x7fffc2a9c700 (LWP 25075)]
[New Thread 0x7fffc229b700 (LWP 25076)]
[New Thread 0x7fffc1a9a700 (LWP 25077)]
[New Thread 0x7fffc1299700 (LWP 25078)]
[New Thread 0x7fffc0a98700 (LWP 25079)]
[New Thread 0x7fff8bfff700 (LWP 25080)]
[New Thread 0x7fff8b7fe700 (LWP 25081)]
[New Thread 0x7fff8affd700 (LWP 25082)]
[New Thread 0x7fff8a7fc700 (LWP 25083)]
[New Thread 0x7fff89ffb700 (LWP 25084)]
[New Thread 0x7fff897fa700 (LWP 25085)]
[New Thread 0x7fff88ff9700 (LWP 25086)]
[New Thread 0x7fff6bfff700 (LWP 25087)]
[New Thread 0x7fff6b0e8700 (LWP 25088)]
[New Thread 0x7fff6a8e7700 (LWP 25089)]
[Detaching after fork from child process 25090]
[Thread 0x7fff6a8e7700 (LWP 25089) exited]

Thread 1 "texstudio" received signal SIGSEGV, Segmentation fault.
0x00005555559caa0c in LatexCompleter::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
(gdb) backtrace
#0  0x00005555559caa0c in LatexCompleter::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
#1  0x00007ffff6a18c21 in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#2  0x00007ffff6a19352 in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5
#3  0x00007ffff7749e76 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#4  0x00007ffff69f28a0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#5  0x00007ffff77a8681 in QWidgetWindow::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#6  0x00007ffff7749e76 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#7  0x00007ffff69f28a0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#8  0x00007ffff69f5b43 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) ()
   from /lib64/libQt5Core.so.5
#9  0x00007ffff6a3e187 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5Core.so.5
#10 0x00007ffff51b97cf in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#11 0x00007ffff51b9b58 in g_main_context_iterate.constprop () from /lib64/libglib-2.0.so.0
#12 0x00007ffff51b9c23 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#13 0x00007ffff6a3dc06 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /lib64/libQt5Core.so.5
#14 0x00007ffff69f121b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#15 0x00007ffff69f8df6 in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#16 0x0000555555637a32 in main ()

[linderd]

ok, same issue is already here #1100