2 files changed, 6 insertions, 10 deletions
diff --git a/src/comp/middle/trans.rs b/src/comp/middle/trans.rs
index 38aff67b..3c0df9bd 100644
--- a/src/comp/middle/trans.rs
+++ b/src/comp/middle/trans.rs
@@ -1103,7 +1103,7 @@ fn static_size_of_tag(@crate_ctxt cx, @ty.t t) -> uint {
     }
 
     // Pull the type parameters out of the corresponding tag item.
-    let vec[ast.ty_param] ty_params = tag_ty_params(cx, tid);
+    let vec[ast.def_id] ty_params = tag_ty_params(cx, tid);
 
     // Compute max(variant sizes).
     auto max_size = 0u;
@@ -1905,12 +1905,8 @@ fn variant_types(@crate_ctxt cx, &ast.variant v) -> vec[@ty.t] {
 }
 
 // Returns the type parameters of a tag.
-fn tag_ty_params(@crate_ctxt cx, ast.def_id id) -> vec[ast.ty_param] {
-    check (cx.items.contains_key(id));
-    alt (cx.items.get(id).node) {
-        case (ast.item_tag(_, _, ?tps, _)) { ret tps; }
-    }
-    fail;   // not reached
+fn tag_ty_params(@crate_ctxt cx, ast.def_id id) -> vec[ast.def_id] {
+    ret ty.lookup_generic_item_type(cx.sess, cx.type_cache, id)._0;
 }
 
 // Returns the variants in a tag.
diff --git a/src/comp/middle/ty.rs b/src/comp/middle/ty.rs
index 4e4cf34c..00d4b0b3 100644
--- a/src/comp/middle/ty.rs
+++ b/src/comp/middle/ty.rs
@@ -1664,15 +1664,15 @@ fn replace_type_params(@t typ, hashmap[ast.def_id,@t] param_map) -> @t {
 // Substitutes the type parameters specified by @ty_params with the
 // corresponding types in @bound in the given type. The two vectors must have
 // the same length.
-fn substitute_ty_params(vec[ast.ty_param] ty_params, vec[@t] bound, @t ty)
+fn substitute_ty_params(vec[ast.def_id] ty_params, vec[@t] bound, @t ty)
         -> @t {
-    auto ty_param_len = _vec.len[ast.ty_param](ty_params);
+    auto ty_param_len = _vec.len[ast.def_id](ty_params);
     check (ty_param_len == _vec.len[@t](bound));
 
     auto bindings = common.new_def_hash[@t]();
     auto i = 0u;
     while (i < ty_param_len) {
-        bindings.insert(ty_params.(i).id, bound.(i));
+        bindings.insert(ty_params.(i), bound.(i));
         i += 1u;
     }