Hello Maxim, your gtk+ update on core-updates broke gnome packages since it somehow moved the bin/ subdirectory from the bin to the out output, so that gtk-update-icon-cache is not found any more by packages using gtk+:bin as input.
Should the split not happen automagically? Maybe this is a deficiency of the meson build system? I think you or a gnome team member will be much quicker than me to fix it. Andreas