[][src]Existential Type rustc_codegen_llvm::llvm_util::

existential type : : Iterator<Item = (&'static str, Option<&'static str>)>;
🔬 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?