diff --git a/bootstraptest/test_knownbug.rb b/bootstraptest/test_knownbug.rb
index 710331427a..89a643a4e7 100644
--- a/bootstraptest/test_knownbug.rb
+++ b/bootstraptest/test_knownbug.rb
@@ -24,3 +24,11 @@ assert_equal 'ok', %q{
   :ok
 }, '[ruby-dev:31816]'
 
+assert_equal 'ok', %q{
+  Process.setrlimit(Process::RLIMIT_STACK, 1024*1024)
+  class C
+    attr "a" * (2*1024*1024)
+  end
+  :ok
+}, '[ruby-dev:31818]'
+