From 03f0dd6d31967b7120a4fd8e841f5c23979f793d Mon Sep 17 00:00:00 2001
From: Alon Levy <alon@pobox.com>
Date: Tue, 23 Dec 2014 17:08:13 +0200
Subject: client/model/graph/removeNode: complain early on unknown id

---
 src/client/model/graph.js | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/client/model/graph.js b/src/client/model/graph.js
index 9d178636..26bf96b2 100644
--- a/src/client/model/graph.js
+++ b/src/client/model/graph.js
@@ -148,6 +148,10 @@ function Graph() {
 
     this.removeNode = function(id) {
         var n = find_node__by_id(id);
+        if (n === undefined) {
+            console.log('bug: nonexistent node cannot be removed: ' + id);
+            return;
+        }
         this._remove_node_set([n]);
     }
 
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