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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Regexp-RegGrp-2.10.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 10 KiB
[ebuild  N     ] dev-perl/Safe-Isa-1.0.10::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 7 KiB
[ebuild  N     ] dev-perl/CSS-Packer-2.90.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 10 KiB
[ebuild  N     ] dev-perl/JavaScript-Packer-2.120.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 280 KiB
[ebuild  N     ] dev-perl/HTML-Packer-2.110.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 14 KiB

Total: 5 packages (5 new), Size of downloads: 319 KiB