From 14be8a7f14fdcc4d146efc7501be9933e0a817b0 Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Mon, 31 Dec 2018 16:36:39 +0100
Subject: [PATCH] const-stabilize Ipv4Addr::new

---
 src/libstd/lib.rs    | 2 +-
 src/libstd/net/ip.rs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 82cee70232aa7..a7ed7c3b81a3b 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -243,7 +243,7 @@
 #![feature(compiler_builtins_lib)]
 #![feature(concat_idents)]
 #![cfg_attr(stage0, feature(const_int_ops))]
-#![feature(const_ip)]
+#![cfg_attr(stage0, feature(const_ip))]
 #![feature(const_raw_ptr_deref)]
 #![feature(const_cstr_unchecked)]
 #![feature(core_intrinsics)]
diff --git a/src/libstd/net/ip.rs b/src/libstd/net/ip.rs
index 52a29f4885f56..f98113e0896f7 100644
--- a/src/libstd/net/ip.rs
+++ b/src/libstd/net/ip.rs
@@ -328,7 +328,7 @@ impl Ipv4Addr {
     /// let addr = Ipv4Addr::new(127, 0, 0, 1);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_unstable(feature = "const_ip")]
+    #[cfg_attr(stage0, rustc_const_unstable(feature = "const_ip"))]
     pub const fn new(a: u8, b: u8, c: u8, d: u8) -> Ipv4Addr {
         Ipv4Addr {
             inner: c::in_addr {