Fix compiling for all features.

src/scope.rs

@@ -4,7 +4,7 @@ use crate::any::{Dynamic, Variant};
 use crate::parser::{map_dynamic_to_expr, Expr};
 use crate::token::Position;
 
-use crate::stdlib::{borrow::Cow, iter, vec::Vec};
+use crate::stdlib::{borrow::Cow, boxed::Box, iter, vec::Vec};
 
 /// Type of an entry in the Scope.
 #[derive(Debug, Eq, PartialEq, Hash, Copy, Clone)]
@@ -362,7 +362,7 @@ impl<'a> Scope<'a> {
     }
 
     /// Get an iterator to entries in the Scope.
-    pub fn iter(&self) -> impl Iterator<Item = &Entry> {
+    pub(crate) fn iter(&self) -> impl Iterator<Item = &Entry> {
         self.0.iter().rev() // Always search a Scope in reverse order
     }
 }