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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libatomic_ops-7.10.0::gentoo  531 KiB
[ebuild  N     ] dev-libs/mimalloc-3.4.5:0/3::gentoo  USE="-debug -test" 1391 KiB
[ebuild  N     ] dev-lang/moarvm-2026.02::gentoo  USE="jit (-asan) -clang -debug -doc -optimize -static-libs -ubsan" 15045 KiB

Total: 3 packages (3 new), Size of downloads: 16966 KiB