I recently discovered that in Rust, this is a relatively common operation: let foo = String::from("foo"); // stuff that needs ownership let foo = &foo; Or this: let mut vec = Vec::new(); vec.push("a"); vec.push("b"); let vec = vec; /* vec is immutable now */ This is a particularly permissive form of name-shadowing, which allows you to re-declare a variable in an inner scope that shadows the name of a variable in an outer scope, making the outer variable inaccessible.
