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

Calculating dependencies ... done!
Dependency resolution took 0.95 s (backtrack: 0/20).

[ebuild   R    ] dev-libs/libffi-3.5.2:0/8::gentoo  USE="exec-static-trampoline -debug -pax-kernel -static-libs -test" 1390 KiB

Total: 1 package (1 reinstall), Size of downloads: 1390 KiB