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

Calculating dependencies ... done!
Dependency resolution took 1.70 s (backtrack: 0/20).

[ebuild  N     ] net-libs/llhttp-9.4.3:0/9.4::gentoo  40 KiB
[ebuild  N     ] dev-libs/libgit2-1.9.7:0/1.9::gentoo  USE="ssh -examples -gssapi -test -trace" 7588 KiB
[ebuild  NS    ] dev-lang/rust-bin-1.99.0:1.99.0::gentoo [1.94.0:1.94.0::gentoo] USE="clippy rustfmt (-big-endian) -doc* (-prefix) -rust-analyzer -rust-src -verify-sig" CPU_FLAGS_X86="sse2" LLVM_SLOT="(23%*) (-21%*)" 205530 KiB
[ebuild  N     ] dev-util/cargo-c-0.10.26::gentoo  USE="-debug" 32441 KiB
[ebuild  N     ] media-gfx/libimagequant-4.3.4::gentoo  USE="-debug" 1791 KiB
[ebuild  N     ] media-gfx/pngquant-2.18.0::gentoo  USE="openmp -debug -lcms -test" CPU_FLAGS_X86="sse2" 70 KiB

Total: 6 packages (5 new, 1 in new slot), Size of downloads: 247457 KiB