diff --git a/bootstraptest/test_knownbug.rb b/bootstraptest/test_knownbug.rb
index cc422194e7..b2d7ca9b8a 100644
--- a/bootstraptest/test_knownbug.rb
+++ b/bootstraptest/test_knownbug.rb
@@ -172,3 +172,8 @@ assert_equal 'ok', %q{
   end
   m
 }, '[ruby-dev:34492]'
+
+assert_normal_exit %q{
+  r = 0**-1
+  r + r
+}, '[ruby-dev:34524]'