diff --git a/src/hb-ot-layout-gsubgpos.hh b/src/hb-ot-layout-gsubgpos.hh
index 117aeaad4..bc7e91c03 100644
--- a/src/hb-ot-layout-gsubgpos.hh
+++ b/src/hb-ot-layout-gsubgpos.hh
@@ -120,6 +120,8 @@ struct hb_closure_context_t :
     }
 
     hb_set_t *covered_glyph_set = done_lookups_glyph_set->get (lookup_index);
+    if (covered_glyph_set->in_error ())
+      return true;
     if (parent_active_glyphs ()->is_subset (covered_glyph_set))
       return true;
 
diff --git a/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5416421032067072 b/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5416421032067072
new file mode 100644
index 000000000..6b245f3a7
Binary files /dev/null and b/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5416421032067072 differ