revert r60596 because it cause faulure on TestFile#test_realpath_taintedness

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60598 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

file.c

@@ -4086,7 +4086,7 @@ rb_check_realpath_internal(VALUE basedir, VALUE path, enum rb_realpath_mode mode
 	}
     }
 
-    OBJ_INFECT(resolved, unresolved_path);
+    OBJ_TAINT(resolved);
     RB_GC_GUARD(unresolved_path);
     RB_GC_GUARD(curdir);
     return resolved;

test/ruby/test_file.rb

@@ -283,23 +283,6 @@ class TestFile < Test::Unit::TestCase
     }
   end
 
-  def test_realpath_taintedness
-    Dir.mktmpdir('rubytest-realpath') {|tmpdir|
-      realdir = File.realpath(tmpdir)
-      assert_predicate(realdir, :tainted?)
-      dir, base = File.split(realdir)
-      assert_predicate(File.realpath(base, dir), :tainted?)
-      base.untaint
-      assert_predicate(File.realpath(base, dir), :tainted?)
-      base.taint
-      dir.untaint
-      assert_predicate(File.realpath(base, dir), :tainted?)
-      base.untaint
-      assert_not_predicate(File.realpath(base, dir), :tainted?)
-      assert_predicate(Dir.chdir(dir) {File.realpath(base)}, :tainted?)
-    }
-  end
-
   def test_realdirpath
     Dir.mktmpdir('rubytest-realdirpath') {|tmpdir|
       realdir = File.realpath(tmpdir)