From f688ccc7cf54f568214dbb71d2c96bdeff9a6b03 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Sat, 5 Nov 2022 08:03:55 +0100
Subject: [PATCH] Purge: fixed concurrent modification

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

diff --git a/app/src/main/java/eu/faircode/email/Core.java b/app/src/main/java/eu/faircode/email/Core.java
index 354bfa391f..173ac301e8 100644
--- a/app/src/main/java/eu/faircode/email/Core.java
+++ b/app/src/main/java/eu/faircode/email/Core.java
@@ -2911,7 +2911,7 @@ class Core {
                         ifolder.setFlags(list.toArray(new Message[0]), flags, true);
                     } catch (MessagingException ex) {
                         Log.w(ex);
-                        for (Message imessage : list)
+                        for (Message imessage : new ArrayList<>(list))
                             try {
                                 imessage.setFlag(Flags.Flag.DELETED, true);
                             } catch (MessagingException mex) {