add some RPC error reporting

1 files changed, 10 insertions, 0 deletions

diff --git a/tt-rss.js b/tt-rss.js
index c5a57e1fa..35b7c9fbe 100644
--- a/tt-rss.js
+++ b/tt-rss.js
@@ -70,8 +70,18 @@ function refetch_callback() {
 		document.title = "Tiny Tiny RSS";
 		notify("All feeds updated.");
 
+		if (!xmlhttp.responseXML) {
+			notify("refetch_callback: backend did not return valid XML");
+			return;
+		}
+
 		var reply = xmlhttp.responseXML.firstChild;
 
+		if (!reply) {
+			notify("refetch_callback: backend did not return expected XML object");
+			return;
+		}
+
 		var f_document = window.frames["feeds-frame"].document;
 
 		for (var l = 0; l < reply.childNodes.length; l++) {