Adding new ui test for trait impl

src/librustc/infer/error_reporting/util.rs

@@ -40,7 +40,6 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                         let node_id = self.tcx.hir.as_local_node_id(id).unwrap();
                         match self.tcx.hir.find(node_id) {
                             Some(hir_map::NodeItem(..)) |
-                            Some(hir_map::NodeImplItem(..)) |
                             Some(hir_map::NodeTraitItem(..)) => { /* proceed ahead */ }
                             _ => return false, // inapplicable
                             // we target only top-level functions

src/test/ui/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.rs

@@ -0,0 +1,27 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+trait Foo {
+
+    fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32;
+
+}
+
+impl Foo for () {
+
+    fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32 {
+
+        if x > y { x } else { y }
+
+    }
+
+}
+
+fn main() {}

src/test/ui/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.stderr

@@ -0,0 +1,27 @@
+error[E0312]: lifetime of reference outlives lifetime of borrowed content...
+  --> $DIR/ex1-return-one-existing-name-if-else-using-impl.rs:21:20
+   |
+21 |         if x > y { x } else { y }
+   |                    ^
+   |
+note: ...the reference is valid for the lifetime 'a as defined on the method body at 19:5...
+  --> $DIR/ex1-return-one-existing-name-if-else-using-impl.rs:19:5
+   |
+19 | /     fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32 {
+20 | |
+21 | |         if x > y { x } else { y }
+22 | |
+23 | |     }
+   | |_____^
+note: ...but the borrowed content is only valid for the anonymous lifetime #1 defined on the method body at 19:5
+  --> $DIR/ex1-return-one-existing-name-if-else-using-impl.rs:19:5
+   |
+19 | /     fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32 {
+20 | |
+21 | |         if x > y { x } else { y }
+22 | |
+23 | |     }
+   | |_____^
+
+error: aborting due to previous error(s)
+