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

Calculating dependencies ... done!
Dependency resolution took 1.58 s (backtrack: 0/20).

[ebuild  NS    ] dev-lang/rust-bin-1.91.0:1.91.0::gentoo [1.94.0:1.94.0::gentoo] USE="(-big-endian) -clippy* -doc* (-prefix) -rust-analyzer -rust-src -rustfmt* -verify-sig" CPU_FLAGS_X86="sse2" LLVM_SLOT="(21)" 187667 KiB

Total: 1 package (1 in new slot), Size of downloads: 187667 KiB