Description of problem: After upgrading qt5-qtdeclarative-5.6.0-0.7 plasma5 does not boot. No splashscreen but a krunner segfault message then need a hard reset. How reproducible: When starting xorg. Ssh with a remote machine shows that sddm-greeter,kspslashqml ... crash because a segfault in libQtQml.so.5.6. and nouveau driver hangs after. Downgrading qt5-qtdeclarative solve this issue.
*** This bug has been marked as a duplicate of bug 1303643 ***