Ran into issue: Can't returned owned data when its expecting a trait object.

src/renderer/renderer.rs

@@ -116,21 +116,27 @@ impl<'a> DustRenderer<'a> {
         Ok(output)
     }
 
-    /// For rendering a dynamic partial's name
-    fn render_partial_name(
+    /// For rendering a dynamic partial's name or an rvalue template
+    pub fn render_partial_name(
         &'a self,
         body: &'a Vec<PartialNameElement>,
         breadcrumbs: &Vec<&'a dyn IntoContextElement>,
-        blocks: &'a BlockContext<'a>,
     ) -> Result<String, RenderError> {
         let converted_to_template_elements: Vec<TemplateElement<'a>> =
             body.into_iter().map(|e| e.into()).collect();
+        // Simple templates like partial names and reference rvalues
+        // cannot contain blocks or inline partials, so we use a blank
+        // BlockContext.
+        let empty_block_context = BlockContext {
+            breadcrumbs: &Vec::new(),
+            blocks: &InlinePartialTreeElement::new(None, HashMap::new()),
+        };
         self.render_body(
             &Body {
                 elements: converted_to_template_elements,
             },
             breadcrumbs,
-            blocks,
+            &empty_block_context,
         )
     }
 
@@ -311,7 +317,7 @@ impl<'a> DustRenderer<'a> {
                 };
             }
             DustTag::DTPartial(partial) => {
-                let partial_name = self.render_partial_name(&partial.name, breadcrumbs, blocks)?;
+                let partial_name = self.render_partial_name(&partial.name, breadcrumbs)?;
                 if partial.params.is_empty() {
                     let new_breadcrumbs = self.new_breadcrumbs_partial(
                         breadcrumbs,