From 4c166abbbb4e11f9464f97a468fcd34dbc3d2fb5 Mon Sep 17 00:00:00 2001
From: Brian Koropoff <bkoropoff@gmail.com>
Date: Fri, 3 Oct 2014 22:35:16 -0700
Subject: [PATCH] Handle provided trait methods when giving inference error
 suggestions

This fixes an ICE.  Closes issue #17758
---
 src/librustc/middle/typeck/infer/error_reporting.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/librustc/middle/typeck/infer/error_reporting.rs b/src/librustc/middle/typeck/infer/error_reporting.rs
index 8ff5b3c90249..2a8a695b63ed 100644
--- a/src/librustc/middle/typeck/infer/error_reporting.rs
+++ b/src/librustc/middle/typeck/infer/error_reporting.rs
@@ -869,6 +869,19 @@ impl<'a, 'tcx> ErrorReporting for InferCtxt<'a, 'tcx> {
                         ast::TypeImplItem(_) => None,
                     }
                 },
+                ast_map::NodeTraitItem(ref item) => {
+                    match **item {
+                        ast::ProvidedMethod(ref m) => {
+                            Some((m.pe_fn_decl(),
+                                  m.pe_generics(),
+                                  m.pe_fn_style(),
+                                  m.pe_ident(),
+                                  Some(&m.pe_explicit_self().node),
+                                  m.span))
+                        }
+                        _ => None
+                    }
+                }
                 _ => None
             },
             None => None