Thread 1 "QtImageViewer" received signal SIGSEGV, Segmentation fault.
0x00007ffff5bad446 in strlen () from /usr/lib/libc.so.6
(gdb) backtrace full
#0  0x00007ffff5bad446 in strlen () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007ffff69f8291 in QCoreApplication::arguments() ()
   from /usr/lib/libQt5Core.so.5
No symbol table info available.
#2  0x00007fffef62cce7 in ?? () from /usr/lib/libQt5XcbQpa.so.5
No symbol table info available.
#3  0x00007fffef62d834 in ?? () from /usr/lib/libQt5XcbQpa.so.5
No symbol table info available.
#4  0x00007fffeefaac38 in _SmcProcessMessage () from /usr/lib/libSM.so.6
No symbol table info available.
#5  0x00007fffeed9a46c in IceProcessMessages () from /usr/lib/libICE.so.6
No symbol table info available.
#6  0x00007ffff6a20659 in QMetaObject::activate(QObject*, int, int, void**) ()
   from /usr/lib/libQt5Core.so.5
No symbol table info available.
#7  0x00007ffff6a9adfe in QSocketNotifier::activated(int, QSocketNotifier::QPrivateSignal) () from /usr/lib/libQt5Core.so.5
No symbol table info available.