There is a dead project named `rusti` (fails to build on Rust nightly >= 2016-08-01) that can interpret Rust source, and a newer project named `miri` (last comm

There is a dead project named `rusti` (fails to build on Rust nightly >= 2016-08-01) that can interpret Rust source, and a newer project named `miri` (last commit 3 days ago) that interprets MIR output from the compiler. Several of us in the community, me included, would like a REPL, so I'd keep an eye on these projects to see if they go anywhere.