Help kioslave from KF 5.51.0 always crashes

[Heiko Becker]

Hello,

with kio-5.51.0 the help kioslave always crashes here, doesn't matter if I 
use it via F1, the handbook entry in the menu or in khelpcenter directly 
(https://bugs.kde.org/show_bug.cgi?id=399709)

If I revert 
https://cgit.kde.org/kio.git/commit/?id=d428fc8e6447ede81f1e1911d0b66b39265672f3 
it doesn't crash anymore and it becomes usable again, but admittedly I 
don't understand the why yet.

Cheers,
Heiko