"Segmentation fault (core dumped)" is given back when launching most apps on archlinux after upgrade

Noob here ! I have archlabs which runs on archlinux. After normal upgrade, most apps do not run (texmaker, qt5ct ...), when running them from terminal they give the error : "Segmentation fault (core dumped)". I examined most core dumps, couldn't figure out what is the problem, when I tried to run a backtrace, I found this answer to be describing this matter really well (second part of the answer), but does not provide steps for noobs to solve it. here are 1st lines from the backtrace :

Thread 2 (Thread 0x7ffff3684700 (LWP 2439)):
#0  0x00007ffff6a1405f in poll () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007ffff3d4063b in ?? () from /usr/lib/libxcb.so.1
No symbol table info available.
#2  0x00007ffff3d4237b in xcb_wait_for_event () from /usr/lib/libxcb.so.1
No symbol table info available.
#3  0x00007ffff3932c51 in ?? () from /usr/lib/libQt5XcbQpa.so.5
No symbol table info available.
#4  0x00007ffff6dabe0f in ?? () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#5  0x00007ffff67bf422 in start_thread () from /usr/lib/libpthread.so.0
No symbol table info available.
#6  0x00007ffff6a1ebf3 in clone () from /usr/lib/libc.so.6
No symbol table info available.

Thread 1 (Thread 0x7ffff3d20800 (LWP 2433)):
#0  0x00007ffff69dd640 in __tzfile_compute () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007ffff69dc57d in __tz_convert () from /usr/lib/libc.so.6
No symbol table info available.
#2  0x00007ffff69daa61 in ranged_convert () from /usr/lib/libc.so.6
No symbol table info available.
#3  0x00007ffff69dadac in __mktime_internal () from /usr/lib/libc.so.6
No symbol table info available.
#4  0x00007ffff6d9fd30 in qMkTime(tm*) () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#5  0x00007ffff6e749ce in ?? () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#6  0x00007ffff6e75068 in ?? () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#7  0x00007ffff6e7516d in ?? () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#8  0x00007ffff6e75620 in ?? () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#9  0x00007ffff6e7784c in QDateTime::setMSecsSinceEpoch(long long) () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#10 0x00007ffff6e79c81 in QDateTime::fromMSecsSinceEpoch(long long, Qt::TimeSpec, int) () from /usr/lib/libQt5Core.so.5

after this, really long repetitive sections are listed. Thanks in advance.