I just updated kamerka to the upstream KF5 port: https://github.com/dos1/kamerka

On my machine, it segfaults on launch:

Program received signal SIGSEGV, Segmentation fault.
0x00007fffee80fef4 in _GLOBAL__sub_I_qprinterinfo.cpp () from /lib64/libQtGui.so.4
(gdb) bt
#0  0x00007fffee80fef4 in _GLOBAL__sub_I_qprinterinfo.cpp () at /lib64/libQtGui.so.4
#1  0x00007ffff7dec0ca in call_init.part () at /lib64/ld-linux-x86-64.so.2
#2  0x00007ffff7dec1db in _dl_init () at /lib64/ld-linux-x86-64.so.2
#3  0x00007ffff7dddc8a in _dl_start_user () at /lib64/ld-linux-x86-64.so.2
#4  0x0000000000000001 in  ()
#5  0x00007fffffffdf59 in  ()
#6  0x0000000000000000 in  ()


This looks exactly like a segfault I used to have with a libvlc/Qt based app: https://github.com/MBach/Miam-Player/issues/9
It was eventually solved via bug 15311.

Here vlc does not seem involved, so I guess the culprit is qimageblitz:

$ urpmq --requires lib64qimageblitz4
libQtCore.so.4()(64bit)
libQtGui.so.4()(64bit)
libc.so.6()(64bit)
libc.so.6(GLIBC_2.14)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.4)(64bit)
libm.so.6()(64bit)
libm.so.6(GLIBC_2.2.5)(64bit)
libstdc++.so.6()(64bit)
libstdc++.so.6(GLIBCXX_3.4)(64bit)


So actually while writing this issue I've debugged it and narrowed down that it's an upstream bug - the dependency on qimageblitz has to be reconsidered, as it has no Qt5 port.

While open an issue upstream and just keep this one as a reminder to fix (or drop) kamerka before the release of Mageia 6.