I believe what you&#x27;re asking is when rustc will be using a stable, unpatched version of LLVM? Rust is always working to get its custom patches upstreamed, but as soon as it does it typically comes up with more. :) That said, most of Rust&#x27;s custom patches are to do with performance improvements due to compile-time information that C and C++ have no equivalent to, so theoretically Rust could probably exist on a stable branch of LLVM with nothing but a performance hit (and this may actually be the case if there exist OS package managers which don&#x27;t want to package a custom version of LLVM with their Rust distribution, though I don&#x27;t know if any package repos actually go to this length).