From cb50de94f2902b6f55f82c0ba1066fa100ea964b Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Fri, 15 Oct 2021 21:04:03 +0200
Subject: [PATCH] Check precondition

---
 app/src/main/java/eu/faircode/email/Core.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/src/main/java/eu/faircode/email/Core.java b/app/src/main/java/eu/faircode/email/Core.java
index c0f83d814b..b8d71dfd87 100644
--- a/app/src/main/java/eu/faircode/email/Core.java
+++ b/app/src/main/java/eu/faircode/email/Core.java
@@ -1835,6 +1835,8 @@ class Core {
             throw new IllegalArgumentException("Download of sub attachment");
         if (attachment.available)
             return;
+        if (message.uid == null)
+            throw new IllegalArgumentException("Attachment/message uid missing");
 
         // Get message
         Message imessage = ifolder.getMessageByUID(message.uid);