From fdcb16661603d4aff52480ba1d68f37562d1dc4d Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Sun, 10 Nov 2019 21:18:30 -0500
Subject: Bug 145113 - Make "next chunk starts with newline" flag a member
 variable to fix MOZ_ASSERT().

Tag #1273
---
 mailnews/imap/src/nsImapServerResponseParser.cpp | 18 +++++++++---------
 mailnews/imap/src/nsImapServerResponseParser.h   |  3 +++
 2 files changed, 12 insertions(+), 9 deletions(-)

(limited to 'mailnews')

diff --git a/mailnews/imap/src/nsImapServerResponseParser.cpp b/mailnews/imap/src/nsImapServerResponseParser.cpp
index b534c4d5bd..fb51db217d 100644
--- a/mailnews/imap/src/nsImapServerResponseParser.cpp
+++ b/mailnews/imap/src/nsImapServerResponseParser.cpp
@@ -36,6 +36,7 @@ nsImapServerResponseParser::nsImapServerResponseParser(nsImapProtocol &imapProto
     fSelectedMailboxName(nullptr),
     fIMAPstate(kNonAuthenticated),
     fLastChunk(false),
+    fNextChunkStartsWithNewline(false),
     fServerConnection(imapProtocolConnection),
     fHostSessionList(nullptr)
 {
@@ -3110,7 +3111,6 @@ bool nsImapServerResponseParser::msg_fetch_literal(bool chunk, int32_t origin)
 #endif
 
   charsReadSoFar = 0;
-  static bool nextChunkStartsWithNewline = false;
 
   while (ContinueParse() && !fServerConnection.DeathSignalReceived() && (charsReadSoFar < numberOfCharsInThisChunk))
   {
@@ -3125,7 +3125,7 @@ bool nsImapServerResponseParser::msg_fetch_literal(bool chunk, int32_t origin)
       // '\r' is not inserted so the beginning line of the next chunk remains
       // just '\n' and no discard is required.
       // In any case, this "orphan" line is ignored and not processed below.
-      if (nextChunkStartsWithNewline && (*fCurrentLine == '\r'))
+      if (fNextChunkStartsWithNewline && (*fCurrentLine == '\r'))
       {
         // Cause fCurrentLine to point to '\n' which discards the '\r'.
         char *usableCurrentLine = PL_strdup(fCurrentLine + 1);
@@ -3190,11 +3190,11 @@ bool nsImapServerResponseParser::msg_fetch_literal(bool chunk, int32_t origin)
           (fCurrentLine + strlen(fCurrentLine) - (charsReadSoFar - numberOfCharsInThisChunk + 1));
         // Save so original unmodified fCurrentLine is restored below.
         char saveit1 = displayEndOfLine[1];
-        char saveit2;
+        char saveit2 = 0;  // Keep compiler happy.
         // Determine if EOL is split such that Chunk X has the \r and chunk
         // X+1 has the \n.
-        nextChunkStartsWithNewline = (displayEndOfLine[0] == '\r');
-        if (nextChunkStartsWithNewline)
+        fNextChunkStartsWithNewline = (displayEndOfLine[0] == '\r');
+        if (fNextChunkStartsWithNewline)
         {
           saveit2 = displayEndOfLine[2];
           // Add the missing newline and terminate the string.
@@ -3212,13 +3212,13 @@ bool nsImapServerResponseParser::msg_fetch_literal(bool chunk, int32_t origin)
         fServerConnection.HandleMessageDownLoadLine(fCurrentLine, !lastChunk);
         // Restore fCurrentLine's original content.
         displayEndOfLine[1] = saveit1;
-        if (nextChunkStartsWithNewline)
+        if (fNextChunkStartsWithNewline)
           displayEndOfLine[2] = saveit2;
       }
       else
       {
         // Not the last line of a chunk.
-        if (!nextChunkStartsWithNewline)
+        if (!fNextChunkStartsWithNewline)
         {
           // Process unmodified fCurrentLine string.
           fServerConnection.HandleMessageDownLoadLine(fCurrentLine,
@@ -3230,7 +3230,7 @@ bool nsImapServerResponseParser::msg_fetch_literal(bool chunk, int32_t origin)
           // Ignore the orphan '\n' on a line by itself.
           MOZ_ASSERT(strlen(fCurrentLine) == 1 && fCurrentLine[0] == '\n',
                      "Expect '\n' as only character in this line");
-          nextChunkStartsWithNewline = false;
+          fNextChunkStartsWithNewline = false;
         }
       }
     }
@@ -3253,7 +3253,7 @@ bool nsImapServerResponseParser::msg_fetch_literal(bool chunk, int32_t origin)
   }
   else
   {
-    nextChunkStartsWithNewline = false;
+    fNextChunkStartsWithNewline = false;
   }
   return lastChunk;
 }
diff --git a/mailnews/imap/src/nsImapServerResponseParser.h b/mailnews/imap/src/nsImapServerResponseParser.h
index fb5762b6b4..4a21de9059 100644
--- a/mailnews/imap/src/nsImapServerResponseParser.h
+++ b/mailnews/imap/src/nsImapServerResponseParser.h
@@ -256,6 +256,9 @@ private:
   int32_t charsReadSoFar;
   bool fLastChunk;
 
+  // Flags split of \r and \n between chunks in msg_fetch_literal().
+  bool fNextChunkStartsWithNewline;
+
   // points to the current body shell, if any
   RefPtr<nsIMAPBodyShell> m_shell;
 
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