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/Class-ErrorHandler-0.40.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 10 KiB
[ebuild  N     ] dev-perl/Net-Trackback-1.10.0-r2::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 9 KiB

Total: 2 packages (2 new), Size of downloads: 19 KiB