Check the constants’ parameter environment

Author: nagisa

src/librustc_typeck/check/mod.rs

@@ -1151,7 +1151,8 @@ fn check_const<'a,'tcx>(ccx: &CrateCtxt<'a,'tcx>,
                         sp: Span,
                         e: &'tcx hir::Expr,
                         id: ast::NodeId) {
-    ccx.inherited(None).enter(|inh| {
+    let param_env = ParameterEnvironment::for_item(ccx.tcx, id);
+    ccx.inherited(Some(param_env)).enter(|inh| {
         let rty = ccx.tcx.node_id_to_type(id);
         let fcx = FnCtxt::new(&inh, ty::FnConverging(rty), e.id);
         let declty = fcx.tcx.lookup_item_type(ccx.tcx.map.local_def_id(id)).ty;

src/test/run-pass/associated-const-outer-ty-refs.rs

@@ -0,0 +1,21 @@
+// Copyright 2016 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.
+#![feature(associated_consts)]
+
+trait Lattice {
+    const BOTTOM: Self;
+}
+
+// FIXME(#33573): this should work without the 'static lifetime bound.
+impl<T: 'static> Lattice for Option<T> {
+    const BOTTOM: Option<T> = None;
+}
+
+fn main(){}