diff --git a/src/hb-repacker.hh b/src/hb-repacker.hh
index 2cfff9b29..3accabb11 100644
--- a/src/hb-repacker.hh
+++ b/src/hb-repacker.hh
@@ -343,7 +343,9 @@ struct graph_t
     auto* clone = vertices_.push ();
     auto& child = vertices_[child_idx];
     clone_buffer_t* buffer = clone_buffers_.push ();
-    if (!check_success (buffer->copy (child.obj))) {
+    if (vertices_.in_error ()
+        || clone_buffers_.in_error ()
+        || !check_success (buffer->copy (child.obj))) {
       return;
     }
 
diff --git a/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5616763250278400 b/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5616763250278400
new file mode 100644
index 000000000..d58d3f6cb
Binary files /dev/null and b/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5616763250278400 differ