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

Calculating dependencies ... done!
Dependency resolution took 1.69 s (backtrack: 0/20).

[ebuild     U  ] dev-lang/perl-5.42.2:0/5.42::gentoo [5.42.0-r1:0/5.42::gentoo] USE="gdbm -berkdb -doc -minimal" PERL_FEATURES="ithreads (-debug) -quadmath" 14278 KiB
[ebuild  N     ] virtual/perl-Module-CoreList-5.202.603.30::gentoo  0 KiB

Total: 2 packages (1 upgrade, 1 new), Size of downloads: 14278 KiB