Comment 35 for bug 689453

Created attachment 529281
GDB log

David, I've had another hang at shutdown, but not 100% cpu this time. I did a complete GDB session, and inspected every one of the 15 threads running. One is indeed hanging in the IMAP code. The full backtrace is near the end of the file. Relevant parts:

#5 nsPipeInputStream::Wait (this=0x7fe274372910)
    at /home/jonathan/Code/comm-central/mozilla/xpcom/io/nsPipe3.cpp:652
No locals.
#6 0x00007fe2a1cebfd5 in nsPipeInputStream::ReadSegments (
    this=0x7fe274372910,
    writer=0x7fe2a1cec8fb <NS_CopySegmentToBuffer(nsIInputStream*, void*, char const*, P
    readCount=0x7fe26d9fc80c)
    at /home/jonathan/Code/comm-central/mozilla/xpcom/io/nsPipe3.cpp:777
        writeCount = 1924833280
        originalLen = <value optimized out>
        rv = <value optimized out>
        segment = 0x7fe26d9fc858 "\n"
        segmentLen = 32738
#7 0x00007fe2a20616b8 in nsMsgCompressIStream::Read (this=0x7fe275d70950,
    aBuf=0x7fe272baa000 "+ idling\r\n", aCount=7008, aResult=0x7fe26d9fc868)
    at /home/jonathan/Code/comm-central/mailnews/base/util/nsMsgCompressIStream.cpp:175
        bytesRead = 0
        rv = <value optimized out>
        rv = <value optimized out>
#8 0x00007fe2a2044619 in nsMsgLineStreamBuffer::ReadNextLine (
    this=0x7fe270a5d310, aInputStream=0x7fe275d70950,
    aNumBytesInLine=@0x7fe26d9fc928, aPauseForMoreData=@0x7fe26d9fc92c,
    prv=0x7fe26d9fc924, addLineTerminator=0)
    at /home/jonathan/Code/comm-central/mailnews/base/util/nsMsgLineBuffer.cpp:403
        startOfNewData = <value optimized out>
        i = <value optimized out>
        rv = <value optimized out>
        numBytesInStream = 7008
        numFreeBytesInBuffer = <value optimized out>
        numBytesCopied = 0
        nonBlockingStream = 0
        endOfLine = <value optimized out>
        startOfLine = 0x7fe272baa000 "+ idling\r\n"
#9 0x00007fe2a1fb81b8 in nsImapProtocol::CreateNewLineFromSocket (
    this=0x7fe2709c6000)
    at /home/jonathan/Code/comm-central/mailnews/imap/src/nsImapProtocol.cpp:4718
        numBytesInLine = 0
        rv = 0
        kungFuGrip = {<nsCOMPtr_base> = {
            mRawPtr = 0x7fe275d70950}, <No data fields>}
        needMoreData = 0
        newLine = <value optimized out>
#10 0x00007fe2a1fc7b6e in nsImapServerResponseParser::GetNextLineForParser (
    this=0x7fe2709c6290, nextLine=0x7fe2709c62a0)
    at /home/jonathan/Code/comm-central/mailnews/imap/src/nsImapServerResponseParser.cpp
        rv = 1
#11 0x00007fe2a2085569 in nsIMAPGenericParser::AdvanceToNextLine (
    this=0x7fe2709c6290)
    at /home/jonathan/Code/comm-central/mailnews/imap/src/nsIMAPGenericParser.cpp:181
        ok = <value optimized out>
#12 0x00007fe2a20855ff in nsIMAPGenericParser::AdvanceToNextToken (
    this=0x7fe2709c6290)
    at /home/jonathan/Code/comm-central/mailnews/imap/src/nsIMAPGenericParser.cpp:152
No locals.
#13 0x00007fe2a1fc93d2 in nsImapServerResponseParser::ParseIMAPServerResponse (
    this=0x7fe2709c6290, aCurrentCommand=<value optimized out>,
    aIgnoreBadAndNOResponses=0, aGreetingWithCapability=0x0)
    at /home/jonathan/Code/comm-central/mailnews/imap/src/nsImapServerResponseParser.cpp
        placeInTokenString = 0x7fe274349271 "\n"
        tagToken = <value optimized out>
        commandToken = <value optimized out>
        inIdle = <value optimized out>
        sendingIdleDone = 0
        numberOfTaggedResponsesReceived = 0
        copyCurrentCommand = {<nsACString_internal> = {
            mData = 0x7fe274349268 "321", mLength = 10,
            mFlags = 5}, <No data fields>}
#14 0x00007fe2a1fb25f0 in nsImapProtocol::HandleIdleResponses (