---

yaml
---
r: 68604
b: refs/heads/auto
c: 025dc6e
h: refs/heads/master
v: v3

Author: bors

[refs]

@@ -14,6 +14,6 @@ refs/heads/try3: 9387340aab40a73e8424c48fd42f0c521a4875c0
 refs/tags/release-0.3.1: 495bae036dfe5ec6ceafd3312b4dca48741e845b
 refs/tags/release-0.4: e828ea2080499553b97dfe33b3f4d472b4562ad7
 refs/tags/release-0.5: 7e3bcfbf21278251ee936ad53e92e9b719702d73
-refs/heads/auto: fc02d69e9616c2aa119c223b01a19b7d8fd8063d
+refs/heads/auto: 025dc6e64ef364e0978c7a7b07ce1aeedf9810e5
 refs/heads/servo: af82457af293e2a842ba6b7759b70288da276167
 refs/tags/release-0.6: b4ebcfa1812664df5e142f0134a5faea3918544c

branches/auto/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);