From fb2ce5f1115ede2c782cc0e1095584eb07cf032b Mon Sep 17 00:00:00 2001
From: Laurent Montel <montel@kde.org>
Date: Mon, 1 Nov 2021 09:15:31 +0100
Subject: [PATCH] Fix crash when response is empty

---
 src/kmailtransport/servertest.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/kmailtransport/servertest.cpp b/src/kmailtransport/servertest.cpp
index 6e8d711..35079e1 100644
--- a/src/kmailtransport/servertest.cpp
+++ b/src/kmailtransport/servertest.cpp
@@ -236,7 +236,7 @@ bool ServerTestPrivate::handlePopConversation(MailTransport::Socket *socket, int
     // Initial Greeting
     if (stage == 0) {
         // Regexp taken from POP3 ioslave
-        const QString responseWithoutCRLF = response.chopped(2);
+        const QString responseWithoutCRLF = response.isEmpty() ? response : response.chopped(2);
         const QRegularExpression re(QStringLiteral("<[A-Za-z0-9\\.\\-_]+@[A-Za-z0-9\\.\\-_]+>$"), QRegularExpression::CaseInsensitiveOption);
         if (responseWithoutCRLF.indexOf(re) != -1) {
             authenticationResults[type] << Transport::EnumAuthenticationType::APOP;
-- 
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