---

yaml
---
r: 83904
b: refs/heads/dist-snap
c: 025dc6e
h: refs/heads/master
v: v3

Author: bors

[refs]

@@ -6,7 +6,7 @@ refs/heads/try: 0983ebe5310d4eb6d289f636f7ed0536c08bbc0e
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: 147ecfdd8221e4a4d4e090486829a06da1e0ca3c
-refs/heads/dist-snap: fc02d69e9616c2aa119c223b01a19b7d8fd8063d
+refs/heads/dist-snap: 025dc6e64ef364e0978c7a7b07ce1aeedf9810e5
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503
 refs/heads/try3: 9387340aab40a73e8424c48fd42f0c521a4875c0

branches/dist-snap/src/librustc/middle/resolve.rs

@@ -3831,9 +3831,9 @@ impl Resolver {
                                    visitor: ResolveVisitor) {
         match self.resolve_path(trait_reference.path, TypeNS, true, visitor) {
             None => {
+                let idents = self.idents_to_str(trait_reference.path.idents);
                 self.session.span_err(trait_reference.path.span,
-                                      "attempt to implement an \
-                                       unknown trait");
+                                      fmt!("attempt to implement an unknown trait `%s`", idents));
             }
             Some(def) => {
                 self.record_def(trait_reference.ref_id, def);