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

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

[ebuild  N     ] dev-perl/Sub-Install-0.929.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 21 KiB
[ebuild  N     ] dev-perl/Data-OptList-0.114.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 20 KiB

Total: 2 packages (2 new), Size of downloads: 41 KiB