diff --git a/code/chat.js b/code/chat.js
index 71d0196c..fc88c670 100644
--- a/code/chat.js
+++ b/code/chat.js
@@ -680,7 +680,18 @@ window.chat.postMsg = function() {
   var msg = $.trim($('#chatinput input').val());
   if(!msg || msg === '') return;
 
-  if(c === 'debug') return new Function (msg)();
+  if(c === 'debug') {
+    var result;
+    try {
+      result = eval(msg);
+    } catch(e) {
+      if(e.stack) console.error(e.stack);
+      throw e; // to trigger native error message
+    }
+    if(result !== undefined)
+      console.log(result.toString());
+    return result;
+  }
 
   var publik = c === 'public';
   var latlng = map.getCenter();