gistfile1.txt

diff --git a/src/gc/roots.c b/src/gc/roots.c
index 42892c0..5452697 100644
--- a/src/gc/roots.c
+++ b/src/gc/roots.c
@@ -371,6 +371,8 @@ static void scan_registers(MVMThreadContext *tc, MVMGCWorklist *worklist,
             type_map = frame->static_info->body.local_types;
             count    = frame->static_info->body.num_locals;
         }
+if (count * sizeof(MVMRegister) > frame->allocd_work)
+    MVM_panic(1, "FAIL");
         for (i = 0; i < count; i++)
             if (type_map[i] == MVM_reg_str || type_map[i] == MVM_reg_obj)
                 MVM_gc_worklist_add(tc, worklist, &frame->work[i].o);