diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index 0b518cf..fe0999e 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -9858,7 +9858,6 @@
                               intptr_t to_column) const {
   const String& src = String::Handle(Source());
   if (src.IsNull()) {
-    ASSERT(Dart::vm_snapshot_kind() == Snapshot::kFullAOT);
     return Symbols::OptimizedOut().raw();
   }
   intptr_t length = src.Length();