Rust

Remove another `Rc` #86

Job	Run time
Format + check + test	5m 6s
android	26s
Check wasm32 + wasm-bindgen	2m 29s
cargo-deny aarch64-apple-darwin	58s
Check Windows	2m 9s
cargo-deny aarch64-linux-android	41s
cargo-deny i686-pc-windows-gnu	58s
cargo-deny i686-pc-windows-msvc	53s
cargo-deny i686-unknown-linux-gnu	41s
cargo-deny wasm32-unknown-unknown	41s
cargo-deny x86_64-apple-darwin	42s
cargo-deny x86_64-pc-windows-gnu	53s
cargo-deny x86_64-pc-windows-msvc	40s
cargo-deny x86_64-unknown-linux-gnu	50s
cargo-deny x86_64-unknown-linux-musl	39s
cargo-deny x86_64-unknown-redox	43s
	19m 29s

Provide feedback