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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/oniguruma-6.9.10:0/5::gentoo  USE="-crnl-as-line-terminator -static-libs" 957 KiB
[ebuild  N     ] sys-apps/uutils-coreutils-0.10.0::gentoo  USE="-debug (-selinux) -test" LLVM_SLOT="22 -17 -18 -19 -20 -21" 30534 KiB

Total: 2 packages (2 new), Size of downloads: 31490 KiB