Function syntax::fold::noop_fold_where_clause

pub fn noop_fold_where_clause<T: Folder>(
    WhereClause { id: id, predicates: predicates, span: span }: WhereClause, 
    fld: &mut T
) -> WhereClause

🔬 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?