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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] dev-build/corrosion-0.5.2::gentoo  USE="-debug -test" 90 KiB

Total: 1 package (1 new), Size of downloads: 90 KiB