Description of problem: While using Kmail to grab mails from my imap4 account, the process kio_imap4 take all cpu after a few seconds and then kmail wait indefinitely for getting new mail. It happens when I try to open folder containing large amount of mail (more than a few thousands). Version-Release number of selected component (if applicable): kdepim-4.4.8-1.fc14.x86_64 How reproducible: Each time for big folders. Steps to Reproduce: 1. Open Kmail 2. Open big folder on imap account 3. Actual results: Kmail is blocked, kio_imap4 taking all cpu. Expected results: Mail refreshed. Additional info: I tried to get a backtrace of kio_imap4, using gdb kio_imap4 29404 (is this the correct way ? ), here it is : #0 0x00007fec550e6fd8 in ref (inWords=..., stopAtBracket=false) at /usr/include/QtCore/qatomic_x86_64.h:121 #1 QByteArray (inWords=..., stopAtBracket=false) at /usr/include/QtCore/qbytearray.h:382 #2 imapParser::parseOneWord (inWords=..., stopAtBracket=false) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:1981 #3 0x00007fec550ef6a5 in imapParser::parseBody (this=0x27fc080, inWords=...) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:1328 #4 0x00007fec550f01d2 in imapParser::parseFetch (this=0x27fc080, inWords=...) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:1490 #5 0x00007fec550f0f85 in imapParser::parseUntagged (this=0x27fc080, result=...) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:495 #6 0x00007fec550f14fe in imapParser::parseLoop (this=0x27fc080) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:1743 #7 0x00007fec550dffd8 in IMAP4Protocol::get (this=0x27fc050, _url=<value optimized out>) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imap4.cpp:338 #8 0x0000003ffd3928a5 in KIO::SlaveBase::dispatch (this=0x27fc050, command=67, data=...) at /usr/src/debug/kdelibs-4.5.4/kio/kio/slavebase.cpp:1013 #9 0x00007fec550ca844 in IMAP4Protocol::dispatch (this=0x27fc050, command=67, data=...) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imap4.cpp:1828 #10 0x0000003ffd38cbc3 in KIO::SlaveBase::dispatchLoop (this=0x27fc050) at /usr/src/debug/kdelibs-4.5.4/kio/kio/slavebase.cpp:282 #11 0x00007fec550cb558 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imap4.cpp:131 #12 0x0000000000406bf9 in launch (argc=4, _name=0x27e28c8 "kio_imap4", args=<value optimized out>, cwd=0x0, envc=<value optimized out>, envs=<value optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40ac76 "0") at /usr/src/debug/kdelibs-4.5.4/kinit/kinit.cpp:723 #13 0x00000000004077a0 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at /usr/src/debug/kdelibs-4.5.4/kinit/kinit.cpp:1215 #14 0x0000000000407ec5 in handle_requests (waitForPid=<value optimized out>) at /usr/src/debug/kdelibs-4.5.4/kinit/kinit.cpp:1408 #15 0x0000000000408b10 in main (argc=4, argv=0x7fff2d6d5d48, envp=0x7fff2d6d5d70) at /usr/src/debug/kdelibs-4.5.4/kinit/kinit.cpp:1892 An another one on the same process, 30 minutes later : #0 0x00007fec550c2f06 in deref (this=0x7fff2d6d38b0, __in_chrg=<value optimized out>) at /usr/include/QtCore/qatomic_x86_64.h:133 #1 QByteArray::~QByteArray (this=0x7fff2d6d38b0, __in_chrg=<value optimized out>) at /usr/include/QtCore/qbytearray.h:383 #2 0x00007fec550ef6b8 in imapParser::parseBody (this=0x27fc080, inWords=...) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:1328 #3 0x00007fec550f01d2 in imapParser::parseFetch (this=0x27fc080, inWords=...) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:1490 #4 0x00007fec550f0f85 in imapParser::parseUntagged (this=0x27fc080, result=...) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:495 #5 0x00007fec550f14fe in imapParser::parseLoop (this=0x27fc080) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imapparser.cpp:1743 #6 0x00007fec550dffd8 in IMAP4Protocol::get (this=0x27fc050, _url=<value optimized out>) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imap4.cpp:338 #7 0x0000003ffd3928a5 in KIO::SlaveBase::dispatch (this=0x27fc050, command=67, data=...) at /usr/src/debug/kdelibs-4.5.4/kio/kio/slavebase.cpp:1013 #8 0x00007fec550ca844 in IMAP4Protocol::dispatch (this=0x27fc050, command=67, data=...) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imap4.cpp:1828 #9 0x0000003ffd38cbc3 in KIO::SlaveBase::dispatchLoop (this=0x27fc050) at /usr/src/debug/kdelibs-4.5.4/kio/kio/slavebase.cpp:282 #10 0x00007fec550cb558 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdepimlibs-4.5.4/kioslave/imap4/imap4.cpp:131 #11 0x0000000000406bf9 in launch (argc=4, _name=0x27e28c8 "kio_imap4", args=<value optimized out>, cwd=0x0, envc=<value optimized out>, envs=<value optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40ac76 "0") at /usr/src/debug/kdelibs-4.5.4/kinit/kinit.cpp:723 #12 0x00000000004077a0 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at /usr/src/debug/kdelibs-4.5.4/kinit/kinit.cpp:1215 #13 0x0000000000407ec5 in handle_requests (waitForPid=<value optimized out>) at /usr/src/debug/kdelibs-4.5.4/kinit/kinit.cpp:1408 #14 0x0000000000408b10 in main (argc=4, argv=0x7fff2d6d5d48, envp=0x7fff2d6d5d70) at /usr/src/debug/kdelibs-4.5.4/kinit/kinit.cpp:1892
This would be best sent upstream to bugs.kde.org or even mailing list https://mail.kde.org/mailman/listinfo/kdepim-users for feedback.
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