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

Calculating dependencies ... done!
Dependency resolution took 1.53 s (backtrack: 0/20).

[ebuild  N     ] perl-core/Compress-Raw-Zlib-2.206.0::gentoo  PERL_FEATURES="ithreads (-debug) -quadmath" 471 KiB
[uninstall     ] virtual/perl-Compress-Raw-Zlib-2.213.0-r1::gentoo 
[blocks b      ] <perl-core/Compress-Raw-Zlib-2.213.0 ("<perl-core/Compress-Raw-Zlib-2.213.0" is soft blocking virtual/perl-Compress-Raw-Zlib-2.213.0-r1)

Total: 1 package (1 new, 1 uninstall), Size of downloads: 471 KiB
Conflict: 1 block (all satisfied)