From 11d868e92538e34c84593df0b891a4185c4520be Mon Sep 17 00:00:00 2001
From: Niko Matsakis <niko@alum.mit.edu>
Date: Fri, 6 Jul 2012 13:59:17 -0700
Subject: [PATCH] paper over #2586 by not failing when the key is not found

---
 src/rustc/util/ppaux.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/rustc/util/ppaux.rs b/src/rustc/util/ppaux.rs
index c8238d6b057..86a2eb65b90 100644
--- a/src/rustc/util/ppaux.rs
+++ b/src/rustc/util/ppaux.rs
@@ -52,6 +52,10 @@ fn re_scope_id_to_str(cx: ctxt, node_id: ast::node_id) -> str {
                    ast_map::node_id_to_str(cx.items, node_id)]) }
         }
       }
+      none {
+        // FIXME(#2586)
+        #fmt["<unknown-%d>", node_id]
+      }
       _ { cx.sess.bug(
           #fmt["re_scope refers to %s",
                ast_map::node_id_to_str(cx.items, node_id)]) }