From 5d7e283ead6305b3b44caf212de23594f3a5dd8a Mon Sep 17 00:00:00 2001
From: "Felix S. Klock II" <pnkfelix@pnkfx.org>
Date: Wed, 25 Feb 2015 01:35:41 +0100
Subject: Turn `unsafe_no_drop_flag` back into a gated-feature.

Fix #22173
---
 src/libsyntax/feature_gate.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/libsyntax')

diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 32fd5b49f9a..c1865ffa9d9 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -243,7 +243,9 @@ pub static KNOWN_ATTRIBUTES: &'static [(&'static str, AttributeType)] = &[
     ("static_assert", Whitelisted),
     ("no_debug", Whitelisted),
     ("omit_gdb_pretty_printer_section", Whitelisted),
-    ("unsafe_no_drop_flag", Whitelisted),
+    ("unsafe_no_drop_flag", Gated("unsafe_no_drop_flag",
+                                  "unsafe_no_drop_flag has unstable semantics \
+                                   and may be removed in the future")),
 
     // used in resolve
     ("prelude_import", Whitelisted),
-- 
cgit 1.4.1-3-g733a5