IBus build error on sysd-svn

ibus 1.5.21 won't build due to dconf being broke by meson or gcc 9 ? IDK why its like this. I applied the new sed for dconf which allowed that to build now but this hasn't helped building ibus.

undefined reference to 'dconf_is_key' is the error when building. Tried git master of ibus...no help.

Fresh build of systemd-svn lfs is the base. meson 0.52 python 3.8 etc.

archetech