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

Calculating dependencies ... done!
Dependency resolution took 1.06 s (backtrack: 0/20).

[ebuild  N     ] app-text/tree-2.3.2::gentoo  60 KiB
[ebuild  N     ] x11-misc/xclip-0.13::gentoo  30 KiB
[ebuild  N     ] media-gfx/qrencode-4.1.1-r1:0/4::gentoo  USE="png -test" 451 KiB
[ebuild  N     ] app-admin/pass-1.7.4-r5::gentoo  USE="X git -dmenu -emacs -importers -wayland" 64 KiB

Total: 4 packages (4 new), Size of downloads: 604 KiB