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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild   R    ] dev-perl/File-Listing-6.160.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 77 KiB

Total: 1 package (1 reinstall), Size of downloads: 77 KiB