From 1734e8a1491ef831c83c2620b6b0f4a590b67c1f Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Fri, 11 Apr 2014 12:51:15 +0200
Subject: [PATCH] Fix crash in tab completion

Fixes #1. Patch by Maxdamantus.
---
 nix-repl.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/nix-repl.cc b/nix-repl.cc
index ef9be417a..8049008d1 100644
--- a/nix-repl.cc
+++ b/nix-repl.cc
@@ -216,8 +216,10 @@ void NixRepl::completePrefix(string prefix)
 
         } catch (ParseError & e) {
             // Quietly ignore parse errors.
-        }catch (EvalError & e) {
+        } catch (EvalError & e) {
             // Quietly ignore evaluation errors.
+        } catch (UndefinedVarError & e) {
+            // Quietly ignore undefined variable errors.
         }
     }
 }