1 files changed, 13 insertions, 0 deletions
diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index 91d3ac1e93..32918df16d 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -952,4 +952,17 @@ $stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
       ::Warning.warn "\x00a\x00b\x00c".force_encoding("utf-16be")
     end
   end
+
+  def test_undefined_backtrace
+    assert_separately([], "#{<<-"begin;"}\n#{<<-"end;"}")
+    begin;
+      class Exception
+        undef backtrace
+      end
+
+      assert_raise(RuntimeError) {
+        raise RuntimeError, "hello"
+      }
+    end;
+  end
 end