* st.c: add st_foreach_check for fixing iteration over packed table

  and st_delete_safe.  patched by Sokolov Yura at
  https://github.com/ruby/ruby/pull/84


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34963 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/-ext-/st/test_numhash.rb b/test/-ext-/st/test_numhash.rb
index 53dbfedaaf..24dc87c1d9 100644
--- a/test/-ext-/st/test_numhash.rb
+++ b/test/-ext-/st/test_numhash.rb
@@ -32,5 +32,18 @@ class Bug::StNumHash
         assert_equal(up - 1, tbl.size, "delete_safe doesn't change size from #{up} to #{up-1}")
       end
     end
+
+    def test_delete_safe_on_iteration
+      10.downto(1) do |up|
+        tbl = Bug::StNumHash.new
+        1.upto(up){|i| tbl[i] = i}
+        assert_nothing_raised("delete_safe forces iteration to fail with size #{up}") do
+          tbl.each do |k, v, t|
+            assert_equal k, t.delete_safe(k)
+            true
+          end
+        end
+      end
+    end
   end
 end