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

Calculating dependencies ... done!
Dependency resolution took 1.08 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  N     ] dev-util/cargo-tarpaulin-0.37.0::gentoo  USE="-debug" 18380 KiB

Total: 3 packages (3 new), Size of downloads: 26007 KiB