I have sent my proposal to GSoC about improving the warnings of Rust-GCC Frontend and more specifically the warnings that are connected with immutable values .
You can see my full proposal here : https://docs.google.com/document/d/146zKtk6rEbZV7c5Fomt8VomjG8AnzQ4aULHhnM8hh6M/edit?usp=sharing George Liakopoulos