It tries to access some X11 stuff while running on wayland.
Not a crash but exits with code 1:

Using Wayland-EGL
Using the 'xdg-shell-v6' shell integration
KActivities: Database connection:  "kactivities_db_resources_139755836218368_readonly" 
    query_only:          QVariant(qlonglong, 1) 
    journal_mode:        QVariant(QString, "wal") 
    wal_autocheckpoint:  QVariant(qlonglong, 100) 
    synchronous:         QVariant(qlonglong, 0)
Nothing to load - the client id is empty
Nothing to load - the client id is empty
Trying to convert empty KLocalizedString to QString.
Trying to convert empty KLocalizedString to QString.
Trying to convert empty KLocalizedString to QString.
Empty filename passed to function
KActivitiesStats( 0x55bf40cd16a0 ) ResultModelPrivate::onResultScoreUpdated  result added: "kcm:kcm_keyboard.desktop" score: 4 last: 1516135619 first: 1511554586
Trying to convert empty KLocalizedString to QString.
Trying to convert empty KLocalizedString to QString.
Trying to convert empty KLocalizedString to QString.
Empty filename passed to function
KActivitiesStats( 0x55bf40cd16a0 ) ResultModelPrivate::onResultScoreUpdated  result added: "kcm:joystick.desktop" score: 0 last: 1516135623 first: 1516135623
kcm_input: Using X11 backend
X Error of failed request:  BadAtom (invalid Atom parameter)
  Major opcode of failed request:  131 (XInputExtension)
  Minor opcode of failed request:  59 ()
  Atom id in failed request:  0x0
  Serial number of failed request:  23
  Current serial number in output stream:  23