Fixes #1692

CHANGES.md

@@ -12,6 +12,8 @@
   different path, you'll need to set `publicPath` in `webpack.config.js` to
   your preferred path and then rebuild all assets (e.g. `make dist`).
 - Use `listenTo` to avoid memory leaks when views get removed.
+- #1692 Bugfix: `TypeError: oldest_message is undefined`
+
 
 ## 5.0.1 (2019-08-14)
 

src/converse-mam-views.js

@@ -37,6 +37,7 @@ converse.plugins.add('converse-mam-views', {
                 const { _converse } = this.__super__;
                 if (this.content.scrollTop === 0 && this.model.messages.length) {
                     const oldest_message = this.model.getOldestMessage();
+                    if (oldest_message) {
                         const by_jid = this.model.get('jid');
                         const stanza_id = oldest_message && oldest_message.get(`stanza_id ${by_jid}`);
                         this.addSpinner();
@@ -52,6 +53,7 @@ converse.plugins.add('converse-mam-views', {
                         this.clearSpinner();
                     }
                 }
+            }
         },
 
         ChatRoomView: {