Fails in a staging with new glibc:

https://build.opensuse.org/package/live_build_log/openSUSE:Factory:Staging:C/kdelibs4support/standard/x86_64

due to:
[  221s] make[2]: *** [src/CMakeFiles/kf5deprecatedwidgets.dir/build.make:81:
src/kdedeprecatedwidgets.cpp] Segmentation fault


TERM=xterm osc chroot 
abuild@marxinbox:~> cd /home/abuild/rpmbuild/BUILD/kdelibs4support-5.73.0/build
abuild@marxinbox:~/rpmbuild/BUILD/kdelibs4support-5.73.0/build> valgrind
/usr/bin/kgendesignerplugin -o
/home/abuild/rpmbuild/BUILD/kdelibs4support-5.73.0/build/src/kdedeprecatedwidgets.cpp
/home/abuild/rpmbuild/BUILD/kdelibs4support-5.73.0/src/kdedeprecated.widgets
==9637== Memcheck, a memory error detector
==9637== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==9637== Using Valgrind-3.16.0 and LibVEX; rerun with -h for copyright info
==9637== Command: /usr/bin/kgendesignerplugin -o
/home/abuild/rpmbuild/BUILD/kdelibs4support-5.73.0/build/src/kdedeprecatedwidgets.cpp
/home/abuild/rpmbuild/BUILD/kdelibs4support-5.73.0/src/kdedeprecated.widgets
==9637== 
==9637== Invalid read of size 8
==9637==    at 0x4C18480: QObject::thread() const (in
/usr/lib64/libQt5Core.so.5.15.0)
==9637==    by 0x10CE2A: ??? (in /usr/bin/kgendesignerplugin)
==9637==    by 0x4BF4F46: QCoreApplicationPrivate::init() (in
/usr/lib64/libQt5Core.so.5.15.0)
==9637==    by 0x4BF576B: QCoreApplication::QCoreApplication(int&, char**, int)
(in /usr/lib64/libQt5Core.so.5.15.0)
==9637==    by 0x10B6B6: ??? (in /usr/bin/kgendesignerplugin)
==9637==    by 0x50DBE09: (below main) (in /lib64/libc-2.32.so)
==9637==  Address 0x8 is not stack'd, malloc'd or (recently) free'd