After dealing with some libgit2 upgrades, my recently upgraded to git-delta-0.18.2-r1 didn't get rebuilt and preserved-libs kicked in for it. Earlier there was a dev-libs/libgit2:= dep to cover that, but that is now gone. Sam said there might be more to it, as the intention might have been to use bundled copy, but it's not or something, and had me file this bug.