gistfile1.txt

diff --git a/src/io/eventloop.c b/src/io/eventloop.c
index e003af58f..929ef46f7 100644
--- a/src/io/eventloop.c
+++ b/src/io/eventloop.c
@@ -226,7 +226,7 @@ MVMAsyncTask * MVM_io_eventloop_get_active_work(MVMThreadContext *tc, int work_i
     if (work_idx >= 0 && work_idx < MVM_repr_elems(tc, tc->instance->event_loop_active)) {
         MVMObject *task_obj = MVM_repr_at_pos_o(tc, tc->instance->event_loop_active, work_idx);
         if (REPR(task_obj)->ID != MVM_REPR_ID_MVMAsyncTask)
-            MVM_panic(1, "non-AsyncTask fetched from eventloop active work list");
+            MVM_panic(1, "non-AsyncTask fetched from eventloop active work list: was %s", MVM_6model_get_debug_name(tc, task_obj));
         return (MVMAsyncTask *)task_obj;
     }
     else {