From a5cf55125c9e5d36547a31f2ff0f028cc51b4855 Mon Sep 17 00:00:00 2001
From: Clar Charr <clar@charr.xyz>
Date: Wed, 15 Mar 2017 23:07:28 -0400
Subject: [PATCH] Implement Error for !.

---
 src/libstd/error.rs | 5 +++++
 src/libstd/lib.rs   | 1 +
 2 files changed, 6 insertions(+)

diff --git a/src/libstd/error.rs b/src/libstd/error.rs
index e115263d2eb95..3d80120f6b2bd 100644
--- a/src/libstd/error.rs
+++ b/src/libstd/error.rs
@@ -216,6 +216,11 @@ impl<'a> From<&'a str> for Box<Error> {
     }
 }
 
+#[stable(feature = "never_error", since = "1.18.0")]
+impl Error for ! {
+    fn description(&self) -> &str { *self }
+}
+
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Error for str::ParseBoolError {
     fn description(&self) -> &str { "failed to parse bool" }
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 7fa5ad255609c..c8437fefe84b1 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -273,6 +273,7 @@
 #![feature(linkage)]
 #![feature(macro_reexport)]
 #![feature(needs_panic_runtime)]
+#![feature(never_type)]
 #![feature(num_bits_bytes)]
 #![feature(old_wrapping)]
 #![feature(on_unimplemented)]