1 files changed, 9 insertions, 0 deletions
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index f95876d855..35d30095c2 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1792,6 +1792,15 @@ class TestHash < Test::Unit::TestCase
     assert_no_memory_leak([], prepare, code, bug9187)
   end
 
+  def test_memory_size_after_delete
+    require 'objspace'
+    h = {}
+    1000.times {|i| h[i] = true}
+    big = ObjectSpace.memsize_of(h)
+    1000.times {|i| h.delete(i)}
+    assert_operator ObjectSpace.memsize_of(h), :<, big/10
+  end
+
   def test_wrapper
     bug9381 = '[ruby-core:59638] [Bug #9381]'