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

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Sub-Identify-0.140.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 52 KiB
[ebuild  N     ] dev-perl/SUPER-1.201.905.310::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 15 KiB
[ebuild  N     ] dev-perl/Test-MockModule-0.178.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 24 KiB

Total: 3 packages (3 new), Size of downloads: 90 KiB