Fix error codes

src/librustc_typeck/coherence/orphan.rs

@@ -101,7 +101,7 @@ impl<'cx, 'tcx,'v> visit::Visitor<'v> for OrphanChecker<'cx, 'tcx> {
                 debug!("coherence2::orphan check: default trait impl {}", item.repr(self.tcx));
                 let trait_ref = ty::node_id_to_trait_ref(self.tcx, ast_trait_ref.ref_id);
                 if trait_ref.def_id.krate != ast::LOCAL_CRATE {
-                    span_err!(self.tcx.sess, item.span, E0316,
+                    span_err!(self.tcx.sess, item.span, E0318,
                               "cannot create default implementations for traits outside the \
                                crate they're defined in; define a new trait instead.");
                 }

src/librustc_typeck/coherence/overlap.rs

@@ -141,7 +141,7 @@ impl<'cx, 'tcx,'v> visit::Visitor<'v> for OverlapChecker<'cx, 'tcx> {
                             ty::ty_struct(..) | ty::ty_enum(..) => {},
                             _ => {
                                 let impl_def_id = ast_util::local_def(item.id);
-                                span_err!(self.tcx.sess, self.span_of_impl(impl_def_id), E0317,
+                                span_err!(self.tcx.sess, self.span_of_impl(impl_def_id), E0319,
                                           "implementations for traits providing default \
                                            implementations are only allowed on structs and enums");
 

src/librustc_typeck/diagnostics.rs

@@ -172,8 +172,8 @@ register_diagnostics! {
     E0248, // found value name used as a type
     E0249, // expected constant expr for array length
     E0250, // expected constant expr for array length
-    E0316,  // can't create default impls for traits outside their crates
-    E0317
+    E0318, // can't create default impls for traits outside their crates
+    E0319  // trait impls for defaulted traits allowed just for structs/enums
 }
 
 __build_diagnostic_array! { DIAGNOSTICS }

src/test/compile-fail/typeck-default-trait-impl-supertrait.rs

@@ -0,0 +1,29 @@
+// Copyright 2015 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.
+
+// Test that when a `..` impl applies, we also check that any
+// supertrait conditions are met.
+
+#![feature(optin_builtin_traits)]
+
+trait NotImplemented { }
+
+trait MyTrait : NotImplemented {}
+
+impl MyTrait for .. {}
+
+fn foo<T:MyTrait>() { bar::<T>() }
+
+fn bar<T:NotImplemented>() { }
+
+fn main() {
+    foo::<i32>(); //~ ERROR XXX
+    bar::<i32>(); //~ ERROR XXX
+}