I was building new gentoo with Xorg, and during pango (1.28.1 and 1.28.3 both with X flag) compilation i've got error like in the log. Merging dri2proto and glproto solved problem. Reproducible: Always Steps to Reproduce: 1. start installing new gentoo with X 2. fail at pango compilation Actual Results: emerge fails Expected Results: i think it shouldn't happen
Most likely you're simply facing bug 342393. depclean isn't as safe as it seems.
It looks similar, but i've never used depclean.
*** This bug has been marked as a duplicate of bug 342393 ***