Unlikely. C and Rust have run-time environments. Just not as elaborate as the JVM for Java or a web browser for JS and WASM. It could only be about adding a

Unlikely. C and Rust have run-time environments. Just not as elaborate as the JVM for Java or a web browser for JS and WASM. It could only be about adding a second run-time environment to the same operating system process. That’s what the questions seems to be enquiring about. And it’s about instrumenting the Rust run-time environment with a REPL and human-friendly run-time data structures.