1 files changed, 4 insertions, 1 deletions
diff --git a/runtime/intern_table.cc b/runtime/intern_table.cc
index f587d0170f..49733550fe 100644
--- a/runtime/intern_table.cc
+++ b/runtime/intern_table.cc
@@ -405,7 +405,10 @@ void InternTable::Table::SweepWeaks(UnorderedSet* set, IsMarkedVisitor* visitor)
     if (new_object == nullptr) {
       it = set->erase(it);
     } else {
-      *it = GcRoot<mirror::String>(new_object->AsString());
+      // Don't use AsString as it does IsString check in debug builds which, in
+      // case of userfaultfd GC, is called when the object's content isn't
+      // thereyet.
+      *it = GcRoot<mirror::String>(ObjPtr<mirror::String>::DownCast(new_object));
       ++it;
     }
   }