Feature Name: proc_macro_sandbox Start Date: 2023-08-20 Summary Procedural macro crates can opt-in to precompilation to WebAssembly as part of the publish process. The crate compiles locally (as already done by cargo publish) and then is securely verified by a crates.io-managed service, conceptually similar to docs.rs, which enforces that sources in the crate exactly reproduce the Wasm artifact be