Static rustc_lint::builtin::BOX_POINTERS[]

static BOX_POINTERS: &Lint = &::lint::Lint{name: "BOX_POINTERS",
              default_level: ::lint::Allow,
              desc: "use of owned (Box type) heap memory",
              edition_deny: None,}
🔬 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?