diff --git a/src/abstract_tree/function_expression.rs b/src/abstract_tree/function_expression.rs
index 3d01da5..8e2ced9 100644
--- a/src/abstract_tree/function_expression.rs
+++ b/src/abstract_tree/function_expression.rs
@@ -40,7 +40,7 @@ impl AbstractTree for FunctionExpression {
             }
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "identifier, function call, value or index".to_string(),
+                    expected: "identifier, function call, value, index or yield".to_string(),
                     actual: child.kind().to_string(),
                     location: child.start_position(),
                     relevant_source: source[child.byte_range()].to_string(),
diff --git a/src/abstract_tree/function_node.rs b/src/abstract_tree/function_node.rs
index ca38adc..0030b76 100644
--- a/src/abstract_tree/function_node.rs
+++ b/src/abstract_tree/function_node.rs
@@ -112,6 +112,8 @@ impl AbstractTree for FunctionNode {
         let r#type = Type::function(parameter_types, return_type.take_inner());
         let syntax_position = node.range().into();
 
+        println!("{context}");
+
         Ok(FunctionNode {
             parameters,
             body,
diff --git a/src/abstract_tree/identifier.rs b/src/abstract_tree/identifier.rs
index a4a58ef..78aa223 100644
--- a/src/abstract_tree/identifier.rs
+++ b/src/abstract_tree/identifier.rs
@@ -50,6 +50,8 @@ impl AbstractTree for Identifier {
 
     fn expected_type(&self, context: &Map) -> Result<Type> {
         if let Some((_value, r#type)) = context.variables()?.get(&self.0) {
+            println!("{_value} {}", r#type);
+
             Ok(r#type.clone())
         } else {
             Err(Error::VariableIdentifierNotFound(self.0.clone()))
diff --git a/src/error.rs b/src/error.rs
index 73cb9a8..3c85f26 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -157,10 +157,10 @@ pub enum Error {
         actual: Value,
     },
 
-    /// A `VariableIdentifier` operation did not find its value in the context.
+    /// Failed to find a variable with a value for this key.
     VariableIdentifierNotFound(String),
 
-    /// A `FunctionIdentifier` operation did not find its value in the context.
+    /// Failed to find a variable with a function value for this key.
     FunctionIdentifierNotFound(String),
 
     /// The function failed due to an external error.