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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] sci-libs/libspatialindex-1.9.3-r2:0/6::gentoo  USE="-test" 509 KiB

Total: 1 package (1 new), Size of downloads: 509 KiB