From 4d20783c0aa26ced30b55c3eaaab76f46a01a803 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Sun, 10 Nov 2019 20:22:34 -0500
Subject: Bug 1444389 - Fix crash in
 nsImapProtocol::HandleMessageDownLoadLine().

Tag #1273
---
 mailnews/imap/src/nsImapProtocol.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'mailnews')

diff --git a/mailnews/imap/src/nsImapProtocol.cpp b/mailnews/imap/src/nsImapProtocol.cpp
index 9114a28f2..5e2639a5a 100644
--- a/mailnews/imap/src/nsImapProtocol.cpp
+++ b/mailnews/imap/src/nsImapProtocol.cpp
@@ -3806,6 +3806,7 @@ nsImapProtocol::PostLineDownLoadEvent(const char *line, uint32_t uidOfMessage)
 void nsImapProtocol::HandleMessageDownLoadLine(const char *line, bool isPartialLine,
                                                char *lineCopy)
 {
+  NS_ENSURE_TRUE_VOID(line);
   NS_PRECONDITION(lineCopy == nullptr || !PL_strcmp(line, lineCopy),
                   "line and lineCopy must contain the same string");
   const char *messageLine = line;
-- 
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