From a992fdedf4f53c26ab89c51f76730b30c2d94996 Mon Sep 17 00:00:00 2001
From: Joost Wooning <jwooning@gmail.com>
Date: Mon, 14 Feb 2022 15:55:11 +0100
Subject: [PATCH] catch some errors

---
 src/CanExplorer.js             | 4 +++-
 src/components/CanGraphList.js | 2 +-
 src/components/MessageBytes.js | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/CanExplorer.js b/src/CanExplorer.js
index e602dfb..3a68055 100644
--- a/src/CanExplorer.js
+++ b/src/CanExplorer.js
@@ -488,7 +488,9 @@ export default class CanExplorer extends Component {
         this.setState({ firstFrameTime });
       }
 
-      this.addMessagesToDataCache(part, newMessages, newThumbnails);
+      if (newMessages) {
+        this.addMessagesToDataCache(part, newMessages, newThumbnails);
+      }
 
       // const messages = this.addAndRehydrateMessages(
       //   newMessages,
diff --git a/src/components/CanGraphList.js b/src/components/CanGraphList.js
index 89d7a59..afc17c2 100644
--- a/src/components/CanGraphList.js
+++ b/src/components/CanGraphList.js
@@ -58,7 +58,7 @@ export default class CanGraphList extends Component {
       }
       return;
     }
-    const rect = this.plotListRef.getBoundingClientRect();
+    const rect = this.plotListRef.current.getBoundingClientRect();
     const draggingGraph = this.determineDraggingGraph();
     if (draggingGraph) {
       draggingGraph.ref.hidden = true;
diff --git a/src/components/MessageBytes.js b/src/components/MessageBytes.js
index 99131b2..dd6daf1 100644
--- a/src/components/MessageBytes.js
+++ b/src/components/MessageBytes.js
@@ -29,7 +29,7 @@ export default class MessageBytes extends Component {
         this.props.message.entries.length - 1
       ];
 
-      return nextLastEntry.hexData !== curLastEntry.hexData;
+      return !nextLastEntry || !curLastEntry || nextLastEntry.hexData !== curLastEntry.hexData;
     }
     return nextProps.seekTime !== this.props.seekTime;
   }