marshal.c: register symbol strings first

* marshal.c (r_symreal): register symbol names as strings first so
  that r_symlink always returns valid names.
  [ruby-core:68587] [Bug #10991]
* marshal.c (r_ivar, r_object0): now need to intern symbol names.
* marshal.c (r_object0): compare with symbol names.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50057 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 0 deletions

diff --git a/test/ruby/test_marshal.rb b/test/ruby/test_marshal.rb
index 9b82d52233..3d5d6c9b1f 100644
--- a/test/ruby/test_marshal.rb
+++ b/test/ruby/test_marshal.rb
@@ -252,6 +252,17 @@ class TestMarshal < Test::Unit::TestCase
     assert_include(Marshal.dump([:a, :a]), ';')
   end
 
+  def test_symlink_in_ivar
+    bug10991 = '[ruby-core:68587] [Bug #10991]'
+    sym = Marshal.load("\x04\x08" +
+                       "I" ":\x0bKernel" +
+                       ("\x06" +
+                        ("I" ":\x07@a" +
+                         ("\x06" ":\x07@b" "e;\x0""o:\x0bObject""\x0")) +
+                        "0"))
+    assert_equal(:Kernel, sym, bug10991)
+  end
+
   ClassUTF8 = eval("class R\u{e9}sum\u{e9}; self; end")
 
   iso_8859_1 = Encoding::ISO_8859_1