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

Calculating dependencies ... done!
Dependency resolution took 1.03 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Module-Runtime-0.18.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 27 KiB
[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
[ebuild  N     ] dev-perl/Sub-Exporter-0.991.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 57 KiB
[ebuild  N     ] dev-perl/HTTP-Headers-ActionPack-0.90.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 36 KiB

Total: 5 packages (5 new), Size of downloads: 159 KiB