Digging deeper into http://bugs.gentoo.org/show_bug.cgi?id=169521 issue I found something out.... (0.1) /usr/lib/libXCBEvent.so /usr/lib/libXCBReply.so.0 /usr/lib/libXCBRenderUtil.so /usr/lib/libXCBWM.so /usr/lib/libXCBImage.so /usr/lib/libXCBICCCM.so /usr/lib/libXCBRenderUtil.so.0 /usr/lib/libXCBWM.so.0 /usr/lib/libXCBImage.so.0 /usr/lib/libXCBEvent.so.0 /usr/lib/libXCBReply.so IS NOW (0.2) /usr/lib/libxcb-wm.so.0 /usr/lib/libxcb-reply.so.0 /usr/lib/libxcb-render-util.so.0 /usr/lib/libxcb-property.so.0 /usr/lib/libxcb-keysyms.so.0 /usr/lib/libxcb-image.so.0 /usr/lib/libxcb-icccm.so.0 /usr/lib/libxcb-event.so.0 /usr/lib/libxcb-aux.so.0 /usr/lib/libxcb-atom.so.0 x11-misc/notification-daemon on revdep-rebuild is wanting the old file name. Not sure if its hardcoded or libtool or something else. Add another symlink(ugggg), or fix something bigger. Reproducible: Always
Well sorry but library changing filenames is not a bug. If you have something about x11-misc/notification-daemon, that's probably things getting emerged in a wrong order by revdep-rebuild, pretty hard to tell since you haven't posted any errors or whatever.