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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/IPC-Signal-1.0.0-r3::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 3 KiB
[ebuild  N     ] dev-perl/Proc-WaitStat-1.0.0-r2::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 4 KiB

Total: 2 packages (2 new), Size of downloads: 6 KiB