improve error message with trace_task_dirty feature

Author: sokra

turbopack/crates/turbo-tasks-backend/src/backend/operation/invalidate.rs

@@ -180,11 +180,22 @@ pub fn make_task_dirty(
 
     // There must be no way to invalidate immutable tasks. If there would be a way the task is not
     // immutable.
-    debug_assert!(
-        !task.is_immutable(),
-        "Task {} is immutable, but was made dirty. This should not happen and is a bug.",
-        ctx.get_task_description(task_id)
-    );
+    #[cfg(debug_assertions)]
+    if task.is_immutable() {
+        #[cfg(feature = "trace_task_dirty")]
+        let extra_info = format!(
+            " Invalidation cause: {}",
+            TaskDirtyCauseInContext::new(&cause, ctx)
+        );
+        #[cfg(not(feature = "trace_task_dirty"))]
+        let extra_info = "";
+
+        panic!(
+            "Task {} is immutable, but was made dirty. This should not happen and is a \
+             bug.{extra_info}",
+            ctx.get_task_description(task_id),
+        );
+    }
 
     make_task_dirty_internal(
         &mut task,