---

yaml
---
r: 152308
b: refs/heads/try2
c: 0339b27
h: refs/heads/master
v: v3

Author: Cameron Zwarich

[refs]

@@ -5,7 +5,7 @@ refs/heads/snap-stage3: 78a7676898d9f80ab540c6df5d4c9ce35bb50463
 refs/heads/try: 519addf6277dbafccbb4159db4b710c37eaa2ec5
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
-refs/heads/try2: d123188b20222c8fc5fbc386bd15100b6f3c80ed
+refs/heads/try2: 0339b27e6db07e50bf71edc5eb78133a418a5949
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try2/src/librustc/middle/mem_categorization.rs

@@ -390,12 +390,10 @@ impl<'t,TYPER:Typer> MemCategorizationContext<'t,TYPER> {
             Some(adjustment) => {
                 match *adjustment {
                     ty::AutoObject(..) => {
-                        // Implicity casts a concrete object to trait object
-                        // so just patch up the type
+                        // Implicity cast a concrete object to trait object.
+                        // Result is an rvalue.
                         let expr_ty = if_ok!(self.expr_ty_adjusted(expr));
-                        let mut expr_cmt = (*if_ok!(self.cat_expr_unadjusted(expr))).clone();
-                        expr_cmt.ty = expr_ty;
-                        Ok(Rc::new(expr_cmt))
+                        Ok(self.cat_rvalue_node(expr.id(), expr.span(), expr_ty))
                     }
 
                     ty::AutoAddEnv(..) => {