fix: change where TaskHandle is borrowed to prevent repeat output fetches

src/error.rs

@@ -6,42 +6,13 @@
 #[derive(Debug, Clone, PartialEq)]
 #[non_exhaustive]
 pub enum DagError {
-    /// Invalid dependency: task does not exist
-    InvalidDependency { task_id: u32 },
-    /// Type mismatch in task dependencies
-    TypeMismatch {
-        expected: &'static str,
-        found: &'static str,
-    },
     /// Task panicked during execution
     TaskPanicked { task_id: u32, panic_message: String },
-    /// Result not found for task
-    ResultNotFound { task_id: u32 },
 }
 
 impl std::fmt::Display for DagError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
-            DagError::InvalidDependency { task_id } => {
-                write!(
-                    f,
-                    "Invalid dependency: task #{} does not exist.\n\
-                     \n\
-                     Ensure all task handles reference tasks that have been added to the DAG.",
-                    task_id
-                )
-            }
-            DagError::TypeMismatch { expected, found } => {
-                write!(
-                    f,
-                    "Type mismatch in task dependencies.\n\
-                     Expected: {}\n\
-                     Found: {}\n\
-                     \n\
-                     Verify that dependency types match the task's Input type exactly.",
-                    expected, found
-                )
-            }
             DagError::TaskPanicked {
                 task_id,
                 panic_message,
@@ -54,15 +25,6 @@ impl std::fmt::Display for DagError {
                     task_id, panic_message
                 )
             }
-            DagError::ResultNotFound { task_id } => {
-                write!(
-                    f,
-                    "Result not found for task #{}.\n\
-                     \n\
-                     Call dag.run(|fut| async move {{ tokio::spawn(fut).await.unwrap() }}).",
-                    task_id
-                )
-            }
         }
     }
 }