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/Carp-Clan-6.80.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 34 KiB
[ebuild  N     ] dev-perl/Bit-Vector-7.400.0-r4::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 133 KiB

Total: 2 packages (2 new), Size of downloads: 167 KiB