diff --git a/src/doc/reference.md b/src/doc/reference.md
index 6536172e2da..dfdadb3546b 100644
--- a/src/doc/reference.md
+++ b/src/doc/reference.md
@@ -2279,8 +2279,6 @@ These types help drive the compiler's analysis
   : The lifetime parameter should be considered invariant
 * `malloc`
   : Allocate memory on the managed heap.
-* `opaque`
-  : ___Needs filling in___
 * `owned_box`
   : ___Needs filling in___
 * `stack_exhausted`
@@ -2295,8 +2293,6 @@ These types help drive the compiler's analysis
   : The type parameter should be considered invariant
 * `ty_desc`
   : ___Needs filling in___
-* `ty_visitor`
-  : ___Needs filling in___
 
 > **Note:** This list is likely to become out of date. We should auto-generate
 > it from `librustc/middle/lang_items.rs`.
diff --git a/src/libcore/intrinsics.rs b/src/libcore/intrinsics.rs
index 2586fdc60d5..3d593a0d026 100644
--- a/src/libcore/intrinsics.rs
+++ b/src/libcore/intrinsics.rs
@@ -65,11 +65,14 @@ pub struct TyDesc {
     pub name: &'static str,
 }
 
+#[cfg(stage0)]
 #[lang="opaque"]
 pub enum Opaque { }
 
+#[cfg(stage0)]
 pub type Disr = u64;
 
+#[cfg(stage0)]
 #[lang="ty_visitor"]
 pub trait TyVisitor {
     fn visit_bot(&mut self) -> bool;
diff --git a/src/librustc/middle/lang_items.rs b/src/librustc/middle/lang_items.rs
index 3c9ebd86b94..68411549c3c 100644
--- a/src/librustc/middle/lang_items.rs
+++ b/src/librustc/middle/lang_items.rs
@@ -284,7 +284,6 @@ lets_do_this! {
     StartFnLangItem,                 "start",                   start_fn;
 
     TyDescStructLangItem,            "ty_desc",                 ty_desc;
-    TyVisitorTraitLangItem,          "ty_visitor",              ty_visitor;
     OpaqueStructLangItem,            "opaque",                  opaque;
 
     TypeIdLangItem,                  "type_id",                 type_id;
diff --git a/src/librustc/middle/trans/mod.rs b/src/librustc/middle/trans/mod.rs
index f95825c96db..fe7697447ac 100644
--- a/src/librustc/middle/trans/mod.rs
+++ b/src/librustc/middle/trans/mod.rs
@@ -36,7 +36,6 @@ pub mod cabi_arm;
 pub mod cabi_mips;
 pub mod foreign;
 pub mod intrinsic;
-pub mod reflect;
 pub mod debuginfo;
 pub mod machine;
 pub mod adt;
diff --git a/src/librustc/middle/trans/reflect.rs b/src/librustc/middle/trans/reflect.rs
deleted file mode 100644
index 96c2c1f1450..00000000000
--- a/src/librustc/middle/trans/reflect.rs
+++ /dev/null
@@ -1,458 +0,0 @@
-// Copyright 2012 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.
-
-use back::link::mangle_internal_name_by_path_and_seq;
-use llvm::{ValueRef, get_param};
-use middle::trans::adt;
-use middle::trans::base::*;
-use middle::trans::build::*;
-use middle::trans::callee::ArgVals;
-use middle::trans::callee;
-use middle::trans::common::*;
-use middle::trans::datum::*;
-use middle::trans::machine;
-use middle::trans::meth;
-use middle::trans::type_::Type;
-use middle::trans::type_of::*;
-use middle::ty;
-use util::ppaux::ty_to_string;
-
-use arena::TypedArena;
-use libc::c_uint;
-use syntax::ast::DefId;
-use syntax::ast;
-use syntax::ast_map;
-use syntax::parse::token::{InternedString, special_idents};
-use syntax::parse::token;
-
-pub struct Reflector<'a, 'blk, 'tcx: 'blk> {
-    visitor_val: ValueRef,
-    visitor_items: &'a [ty::ImplOrTraitItem],
-    final_bcx: Block<'blk, 'tcx>,
-    tydesc_ty: Type,
-    bcx: Block<'blk, 'tcx>
-}
-
-impl<'a, 'blk, 'tcx> Reflector<'a, 'blk, 'tcx> {
-    pub fn c_uint(&mut self, u: uint) -> ValueRef {
-        C_uint(self.bcx.ccx(), u)
-    }
-
-    pub fn c_bool(&mut self, b: bool) -> ValueRef {
-        C_bool(self.bcx.ccx(), b)
-    }
-
-    pub fn c_slice(&mut self, s: InternedString) -> ValueRef {
-        // We're careful to not use first class aggregates here because that
-        // will kick us off fast isel. (Issue #4352.)
-        let bcx = self.bcx;
-        let str_ty = ty::mk_str_slice(bcx.tcx(), ty::ReStatic, ast::MutImmutable);
-        let scratch = rvalue_scratch_datum(bcx, str_ty, "");
-        let len = C_uint(bcx.ccx(), s.get().len());
-        let c_str = PointerCast(bcx, C_cstr(bcx.ccx(), s, false), Type::i8p(bcx.ccx()));
-        Store(bcx, c_str, GEPi(bcx, scratch.val, [ 0, 0 ]));
-        Store(bcx, len, GEPi(bcx, scratch.val, [ 0, 1 ]));
-        scratch.val
-    }
-
-    pub fn c_size_and_align(&mut self, t: ty::t) -> Vec<ValueRef> {
-        let tr = type_of(self.bcx.ccx(), t);
-        let s = machine::llsize_of_real(self.bcx.ccx(), tr);
-        let a = align_of(self.bcx.ccx(), t);
-        return vec!(self.c_uint(s as uint),
-             self.c_uint(a as uint));
-    }
-
-    pub fn c_tydesc(&mut self, t: ty::t) -> ValueRef {
-        let bcx = self.bcx;
-        let static_ti = get_tydesc(bcx.ccx(), t);
-        PointerCast(bcx, static_ti.tydesc, self.tydesc_ty.ptr_to())
-    }
-
-    pub fn c_mt(&mut self, mt: &ty::mt) -> Vec<ValueRef> {
-        vec!(self.c_uint(mt.mutbl as uint),
-          self.c_tydesc(mt.ty))
-    }
-
-    pub fn visit(&mut self, ty_name: &str, args: &[ValueRef]) {
-        let fcx = self.bcx.fcx;
-        let tcx = self.bcx.tcx();
-        let mth_idx = ty::impl_or_trait_item_idx(token::str_to_ident(format!(
-                        "visit_{}", ty_name).as_slice()),
-                                     self.visitor_items.as_slice()).expect(
-                format!("couldn't find visit method for {}", ty_name).as_slice());
-        let method = match self.visitor_items[mth_idx] {
-            ty::MethodTraitItem(ref method) => (*method).clone(),
-            ty::TypeTraitItem(_) => return,
-        };
-        let mth_ty = ty::mk_bare_fn(tcx, method.fty.clone());
-        debug!("Emit call visit method: visit_{}: {}", ty_name, ty_to_string(tcx, mth_ty));
-        let v = self.visitor_val;
-        debug!("passing {} args:", args.len());
-        let mut bcx = self.bcx;
-        for (i, a) in args.iter().enumerate() {
-            debug!("arg {}: {}", i, bcx.val_to_string(*a));
-        }
-        let result = unpack_result!(bcx, callee::trans_call_inner(
-            self.bcx, None, mth_ty,
-            |bcx, _| meth::trans_trait_callee_from_llval(bcx,
-                                                         mth_ty,
-                                                         mth_idx,
-                                                         v),
-            ArgVals(args), None));
-        let next_bcx = fcx.new_temp_block("next");
-        CondBr(bcx, result, next_bcx.llbb, self.final_bcx.llbb);
-        self.bcx = next_bcx
-    }
-
-    pub fn bracketed(&mut self,
-                     bracket_name: &str,
-                     extra: &[ValueRef],
-                     inner: |&mut Reflector|) {
-        self.visit(format!("enter_{}", bracket_name).as_slice(), extra);
-        inner(self);
-        self.visit(format!("leave_{}", bracket_name).as_slice(), extra);
-    }
-
-    pub fn leaf(&mut self, name: &str) {
-        self.visit(name, []);
-    }
-
-    fn visit_closure_ty(&mut self, fty: &ty::ClosureTy, is_unboxed: bool) {
-        let pureval = ast_fn_style_constant(fty.fn_style);
-        let sigilval = match fty.store {
-            ty::UniqTraitStore => 2u,
-            ty::RegionTraitStore(..) => 4u,
-        };
-        let retval = if ty::type_is_bot(fty.sig.output) {0u} else {1u};
-        let extra = vec!(self.c_uint(pureval),
-                         self.c_uint(sigilval),
-                         self.c_uint(fty.sig.inputs.len()),
-                         self.c_uint(retval));
-        self.visit("enter_fn", extra.as_slice());
-        self.visit_sig(retval, &fty.sig, is_unboxed);
-        self.visit("leave_fn", extra.as_slice());
-    }
-
-    // Entrypoint
-    pub fn visit_ty(&mut self, t: ty::t) {
-        let bcx = self.bcx;
-        let tcx = bcx.tcx();
-        debug!("reflect::visit_ty {}", ty_to_string(bcx.tcx(), t));
-
-        match ty::get(t).sty {
-          ty::ty_bot => self.leaf("bot"),
-          ty::ty_nil => self.leaf("nil"),
-          ty::ty_bool => self.leaf("bool"),
-          ty::ty_char => self.leaf("char"),
-          ty::ty_int(ast::TyI) => self.leaf("int"),
-          ty::ty_int(ast::TyI8) => self.leaf("i8"),
-          ty::ty_int(ast::TyI16) => self.leaf("i16"),
-          ty::ty_int(ast::TyI32) => self.leaf("i32"),
-          ty::ty_int(ast::TyI64) => self.leaf("i64"),
-          ty::ty_uint(ast::TyU) => self.leaf("uint"),
-          ty::ty_uint(ast::TyU8) => self.leaf("u8"),
-          ty::ty_uint(ast::TyU16) => self.leaf("u16"),
-          ty::ty_uint(ast::TyU32) => self.leaf("u32"),
-          ty::ty_uint(ast::TyU64) => self.leaf("u64"),
-          ty::ty_float(ast::TyF32) => self.leaf("f32"),
-          ty::ty_float(ast::TyF64) => self.leaf("f64"),
-
-          ty::ty_open(_) | ty::ty_str | ty::ty_vec(_, None) | ty::ty_trait(..) => {
-              // Unfortunately we can't do anything here because at runtime we
-              // pass around the value by pointer (*u8). But unsized pointers are
-              // fat and so we can't just cast them to *u8 and back. So we have
-              // to work with the pointer directly (see ty_ptr/ty_rptr/ty_uniq).
-              fail!("Can't reflect unsized type")
-          }
-          // FIXME(15049) Reflection for unsized structs.
-          ty::ty_struct(..) if !ty::type_is_sized(bcx.tcx(), t) => {
-              fail!("Can't reflect unsized type")
-          }
-
-          // Should rename to vec_*.
-          ty::ty_vec(ty, Some(sz)) => {
-              let mut extra = (vec!(self.c_uint(sz))).append(self.c_size_and_align(t).as_slice());
-              extra.push(self.c_tydesc(ty));
-              self.visit("evec_fixed", extra.as_slice())
-          }
-          ty::ty_ptr(ref mt) => {
-              match ty::get(mt.ty).sty {
-                  ty::ty_vec(ty, None) => {
-                      let extra = self.c_mt(&ty::mt{ty: ty, mutbl: mt.mutbl});
-                      self.visit("evec_slice", extra.as_slice())
-                  }
-                  ty::ty_str => self.visit("estr_slice", &[]),
-                  ty::ty_trait(..) => {
-                      let extra = [
-                          self.c_slice(token::intern_and_get_ident(
-                                  ty_to_string(tcx, t).as_slice()))
-                      ];
-                      self.visit("trait", extra);
-                  }
-                  _ => {
-                      let extra = self.c_mt(mt);
-                      self.visit("ptr", extra.as_slice())
-                  }
-              }
-          }
-          ty::ty_uniq(typ) => {
-              match ty::get(typ).sty {
-                  ty::ty_trait(..) => {
-                      let extra = [
-                          self.c_slice(token::intern_and_get_ident(
-                                  ty_to_string(tcx, t).as_slice()))
-                      ];
-                      self.visit("trait", extra);
-                  }
-                  // FIXME(15049) allow reflection of Box<[T]>. You'll need to
-                  // restore visit_evec_uniq.
-                  ty::ty_vec(_, None) => {
-                      fail!("Box<[T]> theoretically doesn't exist, so don't try to reflect it")
-                  }
-                  ty::ty_str => fail!("Can't reflect Box<str> which shouldn't be used anyway"),
-                  _ => {
-                      let extra = self.c_mt(&ty::mt {
-                          ty: typ,
-                          mutbl: ast::MutImmutable,
-                      });
-                      self.visit("uniq", extra.as_slice())
-                  }
-              }
-          }
-          ty::ty_rptr(_, ref mt) => {
-              match ty::get(mt.ty).sty {
-                  ty::ty_vec(ty, None) => {
-                      let extra = self.c_mt(&ty::mt{ty: ty, mutbl: mt.mutbl});
-                      self.visit("evec_slice", extra.as_slice())
-                  }
-                  ty::ty_str => self.visit("estr_slice", &[]),
-                  ty::ty_trait(..) => {
-                      let extra = [
-                          self.c_slice(token::intern_and_get_ident(
-                                  ty_to_string(tcx, t).as_slice()))
-                      ];
-                      self.visit("trait", extra);
-                  }
-                  _ => {
-                      let extra = self.c_mt(mt);
-                      self.visit("rptr", extra.as_slice())
-                  }
-              }
-          }
-
-          ty::ty_tup(ref tys) => {
-              let extra = (vec!(self.c_uint(tys.len())))
-                          .append(self.c_size_and_align(t).as_slice());
-              self.bracketed("tup", extra.as_slice(), |this| {
-                  for (i, t) in tys.iter().enumerate() {
-                      let extra = vec!(this.c_uint(i), this.c_tydesc(*t));
-                      this.visit("tup_field", extra.as_slice());
-                  }
-              })
-          }
-
-          // FIXME (#2594): fetch constants out of intrinsic
-          // FIXME (#4809): visitor should break out bare fns from other fns
-          ty::ty_closure(box ref fty) => {
-              self.visit_closure_ty(fty, false);
-          }
-
-          // FIXME (#2594): fetch constants out of intrinsic:: for the
-          // numbers.
-          ty::ty_bare_fn(ref fty) => {
-            let pureval = ast_fn_style_constant(fty.fn_style);
-            let sigilval = 0u;
-            let retval = if ty::type_is_bot(fty.sig.output) {0u} else {1u};
-            let extra = vec!(self.c_uint(pureval),
-                          self.c_uint(sigilval),
-                          self.c_uint(fty.sig.inputs.len()),
-                          self.c_uint(retval));
-            self.visit("enter_fn", extra.as_slice());
-            self.visit_sig(retval, &fty.sig, false);
-            self.visit("leave_fn", extra.as_slice());
-          }
-
-          ty::ty_struct(did, ref substs) => {
-              let fields = ty::struct_fields(tcx, did, substs);
-              let mut named_fields = false;
-              if !fields.is_empty() {
-                  named_fields = fields.get(0).ident.name !=
-                      special_idents::unnamed_field.name;
-              }
-
-              // This and the type_is_sized check on individual field types are
-              // because we cannot reflect unsized types (see note above). We
-              // just pretend the unsized field does not exist and print nothing.
-              // This is sub-optimal.
-              let len = fields.len();
-
-              let extra = (vec!(
-                  self.c_slice(
-                      token::intern_and_get_ident(ty_to_string(tcx,
-                                                            t).as_slice())),
-                  self.c_bool(named_fields),
-                  self.c_uint(len)
-              )).append(self.c_size_and_align(t).as_slice());
-              self.bracketed("class", extra.as_slice(), |this| {
-                  for (i, field) in fields.iter().enumerate() {
-                      let extra = (vec!(
-                        this.c_uint(i),
-                        this.c_slice(token::get_ident(field.ident)),
-                        this.c_bool(named_fields)
-                      )).append(this.c_mt(&field.mt).as_slice());
-                      this.visit("class_field", extra.as_slice());
-                  }
-              })
-          }
-
-          // FIXME (#2595): visiting all the variants in turn is probably
-          // not ideal. It'll work but will get costly on big enums. Maybe
-          // let the visitor tell us if it wants to visit only a particular
-          // variant?
-          ty::ty_enum(did, ref substs) => {
-            let ccx = bcx.ccx();
-            let repr = adt::represent_type(bcx.ccx(), t);
-            let variants = ty::substd_enum_variants(ccx.tcx(), did, substs);
-            let llptrty = type_of(ccx, t).ptr_to();
-            let opaquety = ty::get_opaque_ty(ccx.tcx()).unwrap();
-            let opaqueptrty = ty::mk_ptr(ccx.tcx(), ty::mt { ty: opaquety,
-                                                           mutbl: ast::MutImmutable });
-
-            let make_get_disr = || {
-                let sym = mangle_internal_name_by_path_and_seq(
-                    ast_map::Values([].iter()).chain(None), "get_disr");
-
-                let fn_ty = ty::mk_ctor_fn(ccx.tcx(), ast::DUMMY_NODE_ID,
-                                           [opaqueptrty], ty::mk_u64());
-                let llfdecl = decl_internal_rust_fn(ccx,
-                                                    fn_ty,
-                                                    sym.as_slice());
-                let arena = TypedArena::new();
-                let empty_param_substs = param_substs::empty();
-                let fcx = new_fn_ctxt(ccx, llfdecl, ast::DUMMY_NODE_ID, false,
-                                      ty::mk_u64(), &empty_param_substs,
-                                      None, &arena);
-                let bcx = init_function(&fcx, false, ty::mk_u64());
-
-                // we know the return type of llfdecl is an int here, so
-                // no need for a special check to see if the return type
-                // is immediate.
-                let arg = get_param(llfdecl, fcx.arg_pos(0u) as c_uint);
-                let arg = BitCast(bcx, arg, llptrty);
-                let ret = adt::trans_get_discr(bcx, &*repr, arg, Some(Type::i64(ccx)));
-                assert!(!fcx.needs_ret_allocas);
-                let ret_slot = fcx.get_ret_slot(bcx, ty::mk_u64(), "ret_slot");
-                Store(bcx, ret, ret_slot);
-                match fcx.llreturn.get() {
-                    Some(llreturn) => Br(bcx, llreturn),
-                    None => {}
-                };
-                finish_fn(&fcx, bcx, ty::mk_u64());
-                llfdecl
-            };
-
-            let enum_args = (vec!(self.c_uint(variants.len()), make_get_disr()))
-                            .append(self.c_size_and_align(t).as_slice());
-            self.bracketed("enum", enum_args.as_slice(), |this| {
-                for (i, v) in variants.iter().enumerate() {
-                    let name = token::get_ident(v.name);
-                    let variant_args = [this.c_uint(i),
-                                         C_u64(ccx, v.disr_val),
-                                         this.c_uint(v.args.len()),
-                                         this.c_slice(name)];
-                    this.bracketed("enum_variant",
-                                   variant_args,
-                                   |this| {
-                        for (j, a) in v.args.iter().enumerate() {
-                            let bcx = this.bcx;
-                            let null = C_null(llptrty);
-                            let ptr = adt::trans_field_ptr(bcx, &*repr, null, v.disr_val, j);
-                            let offset = p2i(ccx, ptr);
-                            let field_args = [this.c_uint(j),
-                                               offset,
-                                               this.c_tydesc(*a)];
-                            this.visit("enum_variant_field",
-                                       field_args);
-                        }
-                    })
-                }
-            })
-          }
-
-          // Miscellaneous extra types
-          ty::ty_infer(_) => self.leaf("infer"),
-          ty::ty_err => self.leaf("err"),
-          ty::ty_unboxed_closure(ref def_id, _) => {
-              let closure_map = tcx.unboxed_closures.borrow();
-              let fty = &closure_map.find(def_id).unwrap().closure_type;
-              self.visit_closure_ty(fty, true);
-          }
-          ty::ty_param(ref p) => {
-              let extra = vec!(self.c_uint(p.idx));
-              self.visit("param", extra.as_slice())
-          }
-        }
-    }
-
-    pub fn visit_sig(&mut self, retval: uint, sig: &ty::FnSig, is_unboxed: bool) {
-        let args = if is_unboxed {
-            match ty::get(sig.inputs[0]).sty {
-                ty::ty_tup(ref contents) => contents.iter(),
-                ty::ty_nil => [].iter(),
-                _ => unreachable!()
-            }
-        } else {
-            sig.inputs.iter()
-        };
-
-        for (i, arg) in args.enumerate() {
-            let modeval = 5u;   // "by copy"
-            let extra = vec!(self.c_uint(i),
-                         self.c_uint(modeval),
-                         self.c_tydesc(*arg));
-            self.visit("fn_input", extra.as_slice());
-        }
-        let extra = vec!(self.c_uint(retval),
-                      self.c_bool(sig.variadic),
-                      self.c_tydesc(sig.output));
-        self.visit("fn_output", extra.as_slice());
-    }
-}
-
-// Emit a sequence of calls to visit_ty::visit_foo
-pub fn emit_calls_to_trait_visit_ty<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
-                                                t: ty::t,
-                                                visitor_val: ValueRef,
-                                                visitor_trait_id: DefId)
-                                                -> Block<'blk, 'tcx> {
-    let fcx = bcx.fcx;
-    let final_bcx = fcx.new_temp_block("final");
-    let tydesc_ty = ty::get_tydesc_ty(bcx.tcx()).unwrap();
-    let tydesc_ty = type_of(bcx.ccx(), tydesc_ty);
-    let visitor_items = ty::trait_items(bcx.tcx(), visitor_trait_id);
-    let mut r = Reflector {
-        visitor_val: visitor_val,
-        visitor_items: visitor_items.as_slice(),
-        final_bcx: final_bcx,
-        tydesc_ty: tydesc_ty,
-        bcx: bcx
-    };
-    r.visit_ty(t);
-    Br(r.bcx, final_bcx.llbb);
-    return final_bcx;
-}
-
-pub fn ast_fn_style_constant(fn_style: ast::FnStyle) -> uint {
-    match fn_style {
-        ast::UnsafeFn => 1u,
-        ast::NormalFn => 2u,
-    }
-}
diff --git a/src/librustc/middle/ty.rs b/src/librustc/middle/ty.rs
index d026b31b914..b84bfe95224 100644
--- a/src/librustc/middle/ty.rs
+++ b/src/librustc/middle/ty.rs
@@ -18,8 +18,7 @@ use middle::const_eval;
 use middle::def;
 use middle::dependency_format;
 use middle::lang_items::{FnTraitLangItem, FnMutTraitLangItem};
-use middle::lang_items::{FnOnceTraitLangItem, OpaqueStructLangItem};
-use middle::lang_items::{TyDescStructLangItem, TyVisitorTraitLangItem};
+use middle::lang_items::{FnOnceTraitLangItem, TyDescStructLangItem};
 use middle::mem_categorization as mc;
 use middle::resolve;
 use middle::resolve_lifetime;
@@ -4821,33 +4820,6 @@ pub fn get_tydesc_ty(tcx: &ctxt) -> Result<t, String> {
     })
 }
 
-pub fn get_opaque_ty(tcx: &ctxt) -> Result<t, String> {
-    tcx.lang_items.require(OpaqueStructLangItem).map(|opaque_lang_item| {
-        tcx.intrinsic_defs.borrow().find_copy(&opaque_lang_item)
-            .expect("Failed to resolve Opaque")
-    })
-}
-
-pub fn visitor_object_ty(tcx: &ctxt,
-                         ptr_region: ty::Region,
-                         trait_region: ty::Region)
-                         -> Result<(Rc<TraitRef>, t), String>
-{
-    let trait_lang_item = match tcx.lang_items.require(TyVisitorTraitLangItem) {
-        Ok(id) => id,
-        Err(s) => { return Err(s); }
-    };
-    let substs = Substs::empty();
-    let trait_ref = Rc::new(TraitRef { def_id: trait_lang_item, substs: substs });
-    Ok((trait_ref.clone(),
-        mk_rptr(tcx, ptr_region,
-                mt {mutbl: ast::MutMutable,
-                    ty: mk_trait(tcx,
-                                 trait_ref.def_id,
-                                 trait_ref.substs.clone(),
-                                 ty::region_existential_bound(trait_region))})))
-}
-
 pub fn item_variances(tcx: &ctxt, item_id: ast::DefId) -> Rc<ItemVariances> {
     lookup_locally_or_in_crate_store(
         "item_variance_map", item_id, &mut *tcx.item_variance_map.borrow_mut(),