---

yaml
---
r: 169697
b: refs/heads/master
c: cf136cd
h: refs/heads/master
i:
  169695: 6610045
v: v3

Author: nikomatsakis

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: bdc1bfd8f1740461d2ee39ba41f5245ed8913a2a
+refs/heads/master: cf136cd3507a5e929cff8d03179c0f6d96bdb687
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 5b3cd3900ceda838f5798c30ab96ceb41f962534
 refs/heads/try: 5204084bd2e46af7cc6e0147430e44dd0d657bbb

trunk/src/librustc_trans/trans/common.rs

@@ -992,7 +992,7 @@ pub fn fulfill_obligation<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>,
 let tcx = ccx.tcx();
 
 // Remove any references to regions; this helps improve caching.
-let trait_ref = ty_fold::erase_regions(tcx, trait_ref);
+let trait_ref = erase_regions(tcx, &trait_ref);
 
 // First check the cache.
 match ccx.trait_cache().borrow().get(&trait_ref) {

trunk/src/librustc_trans/trans/monomorphize.rs

@@ -315,8 +315,10 @@ pub fn normalize_associated_type<'tcx,T>(tcx: &ty::ctxt<'tcx>, value: &T) -> T
 {
     debug!("normalize_associated_type(t={})", value.repr(tcx));
 
+    let value = erase_regions(tcx, value);
+
     if !value.has_projection_types() {
-        return value.clone();
+        return value;
     }
 
     // FIXME(#20304) -- cache
@@ -326,7 +328,7 @@ pub fn normalize_associated_type<'tcx,T>(tcx: &ty::ctxt<'tcx>, value: &T) -> T
     let mut selcx = traits::SelectionContext::new(&infcx, &typer);
     let cause = traits::ObligationCause::dummy();
     let traits::Normalized { value: result, obligations } =
-        traits::normalize(&mut selcx, cause, value);
+        traits::normalize(&mut selcx, cause, &value);
 
     debug!("normalize_associated_type: result={} obligations={}",
            result.repr(tcx),