We need to be certain that YP layers (OE-Core, meta-poky, meta-yocto-bsp) do not break YP Compatible status. To do so we can use the yocto-compat-layer/yocto-compat-layer-wrapper script during a build run to ensure the compatibility status isn't affected.
*** Bug 11723 has been marked as a duplicate of this bug. ***
Fix implemented and deployed to both AB clusters: http://git.yoctoproject.org/clean/cgit.cgi/yocto-autobuilder/commit/?id=de7030b2db3b8fd78e8dcbc8d8858c2f0466cd5b