rdoc/constant.rb: reapply r43006 for workaround of

nobu · nobu · commit 41a73480c67b · 2013-12-03T03:18:52.000Z
NoMethodError
* lib/rdoc/constant.rb (RDoc::Constant#documented?): workaround for
  NoMethodError when the original of alias is not found.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43967 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Dec  3 12:17:59 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/rdoc/constant.rb (RDoc::Constant#documented?): workaround for
+	  NoMethodError when the original of alias is not found.
+
 Tue Dec  3 10:43:58 2013  Eric Hodel  <drbrain@segment7.net>
 
 	* ext/openssl/lib/openssl/buffering.rb:  Return ASCII-8BIT strings from
diff --git a/lib/rdoc/constant.rb b/lib/rdoc/constant.rb
@@ -63,7 +63,15 @@ def == other
   # for a documented class or module.
 
   def documented?
-    super or is_alias_for && is_alias_for.documented?
+    return true if super
+    return false unless @is_alias_for
+    case @is_alias_for
+    when String then
+      found = @store.find_class_or_module @is_alias_for
+      return false unless found
+      @is_alias_for = found
+    end
+    @is_alias_for.documented?
   end
 
   ##
