From 0642d99e81738a5822ddd54cd2db2707ad75db56 Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Sun, 23 Aug 2015 04:34:44 +0530
Subject: [PATCH] add help for E0390

---
 src/librustc_typeck/coherence/orphan.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/librustc_typeck/coherence/orphan.rs b/src/librustc_typeck/coherence/orphan.rs
index 8076e63cc55c..0f2232501837 100644
--- a/src/librustc_typeck/coherence/orphan.rs
+++ b/src/librustc_typeck/coherence/orphan.rs
@@ -50,6 +50,8 @@ impl<'cx, 'tcx> OrphanChecker<'cx, 'tcx> {
                 span_err!(self.tcx.sess, span, E0390,
                           "only a single inherent implementation marked with `#[lang = \"{}\"]` \
                            is allowed for the `{}` primitive", lang, ty);
+                span_help!(self.tcx.sess, span,
+                           "consider using a trait to implement these methods");
             }
         }
     }