Skipping over pseudo contexts has fixed most of the tests.

src/renderer/context_element.rs

@@ -21,6 +21,16 @@ pub trait Truthiness {
 
 pub trait Walkable {
     fn walk(&self, segment: &str) -> Result<&dyn ContextElement, WalkError>;
+
+    /// If an element contains meta information and should not be
+    /// returned as the final result of a walk, this function should
+    /// return true.
+    ///
+    /// For example, the iteration context contains $idx and $len but
+    /// it should not be the result of a dot-reference like `{.}`.
+    fn is_pseudo_element(&self) -> bool {
+        false
+    }
 }
 
 pub trait Renderable {