Bug 336893

Application: plasma-desktop (4.11.9)
KDE Platform Version: 4.13.1
Qt Version: 4.8.6
Operating System: Linux 3.13.0-30-generic x86_64
Distribution: Ubuntu 14.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Today I used the milou search plasmoid for the first time. I searched a term (mail) and it showed a list of mail results. I could place the cursor over them and see a preview of the items. Nice. Then I searched another testing term (jupiter) and it immediately crashed  the whole plasma desktop. I tried it again, same results. I changed the term (mercury) and at first it didn't crash, but when a certain new e-mail result was added to the list, it crashed again. I have yet to see if it crashes if I disable e-mail results.

- Custom settings of the application:
* I added the milou search plasmoid to a new empty panel.
* I have some issues with the semantic desktop.  For some days already I can no longer see results from recent files in Dolphin.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7feb765c87c0 (LWP 1937))]

Thread 7 (Thread 0x7feb47d02700 (LWP 1942)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feb6f273ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007feb6f274039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007feb69b20182 in start_thread (arg=0x7feb47d02700) at pthread_create.c:312
#4  0x00007feb75ec130d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7feabc308700 (LWP 1968)):
#0  0x00007feb75eb3fbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007feb6940efe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007feb6940f0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007feb72a897be in QEventDispatcherGlib::processEvents (this=0x7feab40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007feb72a5b0af in QEventLoop::processEvents (this=this@entry=0x7feabc307de0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007feb72a5b3a5 in QEventLoop::exec (this=this@entry=0x7feabc307de0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007feb72957c5f in QThread::exec (this=this@entry=0x1df8d80) at thread/qthread.cpp:537
#7  0x00007feb72a3c823 in QInotifyFileSystemWatcherEngine::run (this=0x1df8d80) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007feb7295a32f in QThreadPrivate::start (arg=0x1df8d80) at thread/qthread_unix.cpp:349
#9  0x00007feb69b20182 in start_thread (arg=0x7feabc308700) at pthread_create.c:312
#10 0x00007feb75ec130d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7feabaa2c700 (LWP 1974)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feb70e3681d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007feb70e36859 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007feb69b20182 in start_thread (arg=0x7feabaa2c700) at pthread_create.c:312
#4  0x00007feb75ec130d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fea733cd700 (LWP 2022)):
#0  0x00007feb75eb3fbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007feb6940efe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007feb6940f0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007feb72a897be in QEventDispatcherGlib::processEvents (this=0x7fea6c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007feb72a5b0af in QEventLoop::processEvents (this=this@entry=0x7fea733cce20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007feb72a5b3a5 in QEventLoop::exec (this=this@entry=0x7fea733cce20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007feb72957c5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#7  0x00007feb7295a32f in QThreadPrivate::start (arg=0x22143c0) at thread/qthread_unix.cpp:349
#8  0x00007feb69b20182 in start_thread (arg=0x7fea733cd700) at pthread_create.c:312
#9  0x00007feb75ec130d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fea7233a700 (LWP 2023)):
#0  0x00007feb75eb26bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007feb6944fc20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007feb6940eb14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007feb6940ef7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007feb6940f0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007feb72a897be in QEventDispatcherGlib::processEvents (this=0x7fea640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007feb72a5b0af in QEventLoop::processEvents (this=this@entry=0x7fea72339de0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007feb72a5b3a5 in QEventLoop::exec (this=this@entry=0x7fea72339de0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007feb72957c5f in QThread::exec (this=this@entry=0x14722d0) at thread/qthread.cpp:537
#9  0x00007feb72a3c823 in QInotifyFileSystemWatcherEngine::run (this=0x14722d0) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007feb7295a32f in QThreadPrivate::start (arg=0x14722d0) at thread/qthread_unix.cpp:349
#11 0x00007feb69b20182 in start_thread (arg=0x7fea7233a700) at pthread_create.c:312
#12 0x00007feb75ec130d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7feb51e1e700 (LWP 2037)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feb70b7720d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007feb70e65fd6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007feb69b20182 in start_thread (arg=0x7feb51e1e700) at pthread_create.c:312
#4  0x00007feb75ec130d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7feb765c87c0 (LWP 1937)):
[KCrash Handler]
#6  0x00007feb75dfcf79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#7  0x00007feb75e00388 in __GI_abort () at abort.c:89
#8  0x00007feb75e3a1d4 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7feb75f48a10 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#9  0x00007feb75e464ae in malloc_printerr (ptr=<optimized out>, str=0x7feb75f48bb0 "free(): invalid next size (fast)", action=1) at malloc.c:4996
#10 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3840
#11 0x00007feb720483ed in free (alignment=8, x=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qvector.h:99
#12 free (this=<optimized out>, x=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qvector.h:468
#13 operator= (v=..., this=0x12f0f70) at ../../include/QtCore/../../src/corelib/tools/qvector.h:395
#14 clear (this=0x12f0f70) at ../../include/QtCore/../../src/corelib/tools/qvector.h:348
#15 QTextEngine::clearLineData (this=0x12f0f70) at text/qtextengine.cpp:1483
#16 0x00007feb7204a1c8 in QTextLayout::clearLayout (this=<optimized out>) at text/qtextlayout.cpp:659
#17 0x00007feb7205bdcc in QTextBlock::clearLayout (this=this@entry=0x7fff54e227f0) at text/qtextobject.cpp:1084
#18 0x00007feb72093043 in QTextDocumentLayout::documentChanged (this=0x38c1500, from=0, oldLength=0, length=8258) at text/qtextdocumentlayout.cpp:2882
#19 0x00007feb7224d5e3 in QTextEditPrivate::relayoutDocument (this=this@entry=0x4cb1a10) at widgets/qtextedit.cpp:1438
#20 0x00007feb7224d957 in QTextEditPrivate::_q_adjustScrollbars (this=0x4cb1a10) at widgets/qtextedit.cpp:297
#21 0x00007feb7224fae2 in _q_adjustScrollbars (this=<optimized out>) at widgets/qtextedit.cpp:260
#22 QTextEdit::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at .moc/release-shared/moc_qtextedit.cpp:212
#23 0x00007feb72a7087a in QMetaObject::activate (sender=0x4e01fa0, m=m@entry=0x7feb728a7e60 <QTextControl::staticMetaObject>, local_signal_index=local_signal_index@entry=9, argv=argv@entry=0x7fff54e22a60) at kernel/qobject.cpp:3539
#24 0x00007feb72033cd5 in QTextControl::documentSizeChanged (this=<optimized out>, _t1=...) at .moc/release-shared/moc_qtextcontrol_p.cpp:308
#25 0x00007feb72039c99 in QTextControl::qt_static_metacall (_o=0x791, _id=1937, _a=0x6, _c=<optimized out>) at .moc/release-shared/moc_qtextcontrol_p.cpp:139
#26 0x00007feb72a7087a in QMetaObject::activate (sender=sender@entry=0x38c1500, m=m@entry=0x7feb728a81e0 <QAbstractTextDocumentLayout::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fff54e22bb0) at kernel/qobject.cpp:3539
#27 0x00007feb72081835 in QAbstractTextDocumentLayout::documentSizeChanged (this=this@entry=0x38c1500, _t1=...) at .moc/release-shared/moc_qabstracttextdocumentlayout.cpp:136
#28 0x00007feb720933e2 in QTextDocumentLayout::documentChanged (this=0x38c1500, from=1547, oldLength=<optimized out>, length=0) at text/qtextdocumentlayout.cpp:2927
#29 0x00007feb72070c81 in QTextDocumentPrivate::finishEdit (this=0x4d7fe20) at text/qtextdocument_p.cpp:1220
#30 0x00007feb720711c4 in QTextDocumentPrivate::endEditBlock (this=<optimized out>) at text/qtextdocument_p.cpp:1201
#31 0x00007feb7207121e in QTextDocumentPrivate::endEditBlock (this=<optimized out>) at text/qtextdocument_p.cpp:1187
#32 0x00007feb720993ab in QTextCursor::removeSelectedText (this=0x7fff54e22da0) at text/qtextcursor.cpp:1662
#33 0x00007fea5ed75aec in Milou::PreviewPlugin::highlight(QTextDocument const*) const () from /usr/lib/libmilou.so.0.1
#34 0x00007fea5dd1a8d2 in ?? () from /usr/lib/kde4/milouemailplugin.so
#35 0x00007feb72a7087a in QMetaObject::activate (sender=sender@entry=0x6ea0890, m=m@entry=0x7feabece5020 <Akonadi::ItemFetchJob::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff54e23180) at kernel/qobject.cpp:3539
#36 0x00007feabe97f782 in Akonadi::ItemFetchJob::itemsReceived (this=this@entry=0x6ea0890, _t1=...) at ./moc_itemfetchjob.cpp:116
#37 0x00007feabe98111b in timeout (this=<optimized out>) at ../../akonadi/itemfetchjob.cpp:78
#38 Akonadi::ItemFetchJobPrivate::aboutToFinish (this=<optimized out>) at ../../akonadi/itemfetchjob.cpp:68
#39 0x00007feabe99347b in Akonadi::JobPrivate::delayedEmitResult (this=<optimized out>) at ../../akonadi/job.cpp:160
#40 0x00007feb72a74c1e in QObject::event (this=0x6ea0890, e=<optimized out>) at kernel/qobject.cpp:1194
#41 0x00007feb71df5e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1042150, receiver=receiver@entry=0x6ea0890, e=e@entry=0x4eef560) at kernel/qapplication.cpp:4567
#42 0x00007feb71dfc4a0 in QApplication::notify (this=this@entry=0x103f000, receiver=receiver@entry=0x6ea0890, e=e@entry=0x4eef560) at kernel/qapplication.cpp:4353
#43 0x00007feb73721d1a in KApplication::notify (this=0x103f000, receiver=0x6ea0890, event=0x4eef560) at ../../kdeui/kernel/kapplication.cpp:311
#44 0x00007feb72a5c4dd in QCoreApplication::notifyInternal (this=0x103f000, receiver=receiver@entry=0x6ea0890, event=event@entry=0x4eef560) at kernel/qcoreapplication.cpp:953
#45 0x00007feb72a5fb3d in sendEvent (event=0x4eef560, receiver=0x6ea0890) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#46 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xf9c1f0) at kernel/qcoreapplication.cpp:1577
#47 0x00007feb72a5ffe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#48 0x00007feb72a89f83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#49 postEventSourceDispatch (s=0x1015ed0) at kernel/qeventdispatcher_glib.cpp:287
#50 0x00007feb6940ee04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#51 0x00007feb6940f048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#52 0x00007feb6940f0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#53 0x00007feb72a897a1 in QEventDispatcherGlib::processEvents (this=0xf9daf0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#54 0x00007feb71e97bb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#55 0x00007feb72a5b0af in QEventLoop::processEvents (this=this@entry=0x7fff54e237d0, flags=...) at kernel/qeventloop.cpp:149
#56 0x00007feb72a5b3a5 in QEventLoop::exec (this=this@entry=0x7fff54e237d0, flags=...) at kernel/qeventloop.cpp:204
#57 0x00007feb72a60b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#58 0x00007feb761c866c in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#59 0x00007feb75de7ec5 in __libc_start_main (main=0x4006e0, argc=1, argv=0x7fff54e23a28, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff54e23a18) at libc-start.c:287
#60 0x000000000040070e in _start ()

Possible duplicates by query: bug 335225, bug 335224, bug 335181, bug 334944, bug 334663.

Reported using DrKonqi