From 44a2576f798b07139adde2d279e48fdbe71a0148 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 1 Jan 2017 09:07:56 +0000
Subject: [PATCH] variable.c: top-level constant look-up

* variable.c (rb_const_search): [EXPERIMENTAL] remove top-level
  constant look-up.  [Feature #11547]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57244 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 NEWS       | 2 ++
 variable.c | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/NEWS b/NEWS
index ca563536e7..daaacf94d9 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,8 @@ with all sufficient information, see the ChangeLog file or Redmine
 
 === Language changes
 
+* Top-level constant look-up is removed.  [Feature #11547]
+
 === Core classes updates (outstanding ones only)
 
 === Stdlib updates (outstanding ones only)
diff --git a/variable.c b/variable.c
index 91482e9d0f..70a28a670f 100644
--- a/variable.c
+++ b/variable.c
@@ -2273,8 +2273,12 @@ rb_const_search(VALUE klass, ID id, int exclude, int recurse, int visibility)
 		continue;
 	    }
 	    if (exclude && tmp == rb_cObject && klass != rb_cObject) {
+#if 0
 		rb_warn("toplevel constant %"PRIsVALUE" referenced by %"PRIsVALUE"::%"PRIsVALUE"",
 			QUOTE_ID(id), rb_class_name(klass), QUOTE_ID(id));
+#else
+		return Qundef;
+#endif
 	    }
 	    return value;
 	}