$ emerge -upv xorg-x11
These are the packages that I would merge, in order:
Calculating dependencies ...done!
[blocks B ] <x11-base/xorg-x11-6.8.0-r4 (is blocking x11-base/opengl-update-2.1.1-r1)
Steps to Reproduce:
Seems to me that a package shouldn't block its own dependencies...
emerge --nodeps opengl-update
*** This bug has been marked as a duplicate of 79606 ***