From 5306f0c98af051b790bcf8344077e781b10f3eb7 Mon Sep 17 00:00:00 2001
From: webzwo0i <webzwo0i@c3d2.de>
Date: Thu, 4 Dec 2014 16:05:02 +0100
Subject: [PATCH] wrap appendRevision in try-catch block

---
 src/node/handler/PadMessageHandler.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/node/handler/PadMessageHandler.js b/src/node/handler/PadMessageHandler.js
index bc8f5d62..1d89288c 100644
--- a/src/node/handler/PadMessageHandler.js
+++ b/src/node/handler/PadMessageHandler.js
@@ -742,7 +742,16 @@ function handleUserChanges(data, cb)
         return callback(new Error("Can't apply USER_CHANGES "+changeset+" with oldLen " + Changeset.oldLen(changeset) + " to document of length " + prevText.length));
       }
 
-      pad.appendRevision(changeset, thisSession.author);
+      try
+      {
+        pad.appendRevision(changeset, thisSession.author);
+      }
+      catch(e)
+      {
+        client.json.send({disconnect:"badChangeset"});
+        stats.meter('failedChangesets').mark();
+        return callback(e)
+      }
 
       var correctionChangeset = _correctMarkersInPad(pad.atext, pad.pool);
       if (correctionChangeset) {