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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libgudev-238-r2::gentoo  USE="-introspection -test" 30 KiB

Total: 1 package (1 new), Size of downloads: 30 KiB