* ext/psych/lib/psych/visitors/yaml_tree.rb: dump empty symbols with a

  tag so that they can be parsed on input. [Bug #9873] [ruby-core:62825]
* test/psych/test_symbol.rb: test for change

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46358 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/psych/test_symbol.rb b/test/psych/test_symbol.rb
index 2b4470d184..558a672886 100644
--- a/test/psych/test_symbol.rb
+++ b/test/psych/test_symbol.rb
@@ -2,6 +2,14 @@ require_relative 'helper'
 
 module Psych
   class TestSymbol < TestCase
+    def test_cycle_empty
+      assert_cycle :''
+    end
+
+    def test_cycle_colon
+      assert_cycle :':'
+    end
+
     def test_cycle
       assert_cycle :a
     end