1 files changed, 5 insertions, 0 deletions
diff --git a/test/dl/test_func.rb b/test/dl/test_func.rb
index 45d475c919..761ae43143 100644
--- a/test/dl/test_func.rb
+++ b/test/dl/test_func.rb
@@ -95,6 +95,11 @@ module DL
       buff = "9341"
       qsort.call(buff, buff.size, 1, cb)
       assert_equal("1349", buff)
+
+      bug4929 = '[ruby-core:37395]'
+      buff = "9341"
+      EnvUtil.under_gc_stress {qsort.call(buff, buff.size, 1, cb)}
+      assert_equal("1349", buff, bug4929)
     end
 
     def test_qsort2()