Constant syntax::std_inject::INJECTED_CRATE_NAME[]

const INJECTED_CRATE_NAME: LocalKey<Cell<Option<&'static str>>> = {
    #[inline]
    fn __init() -> Cell<Option<&'static str>> { loop  { } }
    unsafe fn __getit()
     ->
         ::option::Option<&'static ::cell::UnsafeCell<::option::Option<Cell<Option<&'static str>>>>> {
                                                                                                         loop 
                                                                                                              {
                                                                                                         }
                                                                                                     }
    unsafe { <::thread::LocalKey>::new(__getit, __init) }
}
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?