These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Lchown-1.10.0-r4::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 4 KiB
[ebuild  N     ] app-backup/rsnapshot-1.5.1::gentoo  324 KiB

Total: 2 packages (2 new), Size of downloads: 328 KiB