Cuerrently, we get such a warning if the setscene failed: WARNING: Setscene task 112 (virtual:native:/buildarea/lyang1/yocto/poky/meta/recipes-gnome/gdk-pixbuf/gdk-pixbuf_2.30.3.bb, do_populate_sysroot_setscene) failed with exit code '1' - real task will be run instead It would make the debug easier if it can print where to get more info, for example: Please see tmp/work//x86_64-linux/gdk-pixbuf-native/2.30.3-r0/temp/log.do_populate_sysroot_setscene.28304 for more info.
Fixed in master: http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=c4eeaa8e35e926b6d1f633549f76d1ba9ed9278b