> Version:           1.3 (using Devel)
> OS:                Linux
> Installed from:    Ubuntu repository

I've reproduced the crash using r882292





Application: Kontact (kontact), signal SIGSEGV
 [?1034h[Thread debugging using libthread_db enabled]
0x00007fb720388261 in nanosleep () from /lib64/libc.so.6
[Current thread is 0 (LWP 8649)]

Thread 2 (Thread 0x420b0950 (LWP 8652)):
#0  0x00007fb7203b2662 in select () from /lib64/libc.so.6
#1  0x00007fb72b2438d6 in ?? () from /usr/lib64/libQtCore.so.4
#2  0x00007fb72b18d764 in ?? () from /usr/lib64/libQtCore.so.4
#3  0x00007fb72af1e040 in start_thread () from /lib64/libpthread.so.0
#4  0x00007fb7203b90cd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fb72b6fb700 (LWP 8649)):
[KCrash Handler]
#5  Kpgp::Module::storePassPhrase (this=0x0) at /home/test/KDE4/src/kdepim/libkpgp/kpgp.cpp:186
#6  0x00007fb71511cdfd in Kpgp::Config::setValues (this=0xe3d890) at /home/test/KDE4/src/kdepim/libkpgp/kpgpui.cpp:227
#7  0x00007fb7151250dd in Config (this=0xe3d890, parent=<value optimized out>, encrypt=false) at /home/test/KDE4/src/kdepim/libkpgp/kpgpui.cpp:215
#8  0x00007fb7155fd0ba in PrivacyWidget (this=0xe39d60, inst=<value optimized out>, parent=<value optimized out>) at /home/test/KDE4/src/kdepim/knode/knconfigwidgets.cpp:1688
#9  0x00007fb7158f9541 in create_knode_config_privacy (parent=0xe357a0) at /home/test/KDE4/src/kdepim/knode/knconfigpages.cpp:178
#10 0x00007fb72199eef7 in KCModuleLoader::loadModule (mod=@0xe1c650, report=KCModuleLoader::Inline, parent=0xe357a0, args=@0xe1c620) at /home/test/KDE4/src/kdelibs/kutils/kcmoduleloader.cpp:112
#11 0x00007fb7219a437a in KCModuleProxyPrivate::loadModule (this=0xe1c620) at /home/test/KDE4/src/kdelibs/kutils/kcmoduleproxy.cpp:107
#12 0x00007fb7219a5365 in KCModuleProxy::realModule (this=<value optimized out>) at /home/test/KDE4/src/kdelibs/kutils/kcmoduleproxy.cpp:83
#13 0x00007fb7219a5379 in KCModuleProxy::minimumSizeHint (this=0x0) at /home/test/KDE4/src/kdelibs/kutils/kcmoduleproxy.cpp:346
#14 0x00007fb72a6cb8f3 in KPageViewPrivate::_k_modelChanged (this=0xb3d7b0) at /home/test/KDE4/src/kdelibs/kdeui/paged/kpageview.cpp:204
#15 0x00007fb72a6cbac9 in KPageView::qt_metacall (this=0x9284d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff3373f480)
    at /home/test/KDE4/src/build/kdelibs/kdeui/kpageview.moc:92
#16 0x00007fb72a6ced26 in KPageWidget::qt_metacall (this=0x0, _c=863233632, _id=35, _a=0xe3e1c0) at /home/test/KDE4/src/build/kdelibs/kdeui/kpagewidget.moc:69
#17 0x00007fb72b2704e0 in QMetaObject::activate () from /usr/lib64/libQtCore.so.4
#18 0x00007fb7219a0757 in KCMultiDialog::addModule (this=0xb437f0, moduleInfo=@0xca23e0, parentItem=0xb3afb0, args=<value optimized out>)
    at /home/test/KDE4/src/kdelibs/kutils/kcmultidialog.cpp:305
#19 0x00007fb7219b91a6 in KSettings::DialogPrivate::createDialogFromServices (this=0x832950) at /home/test/KDE4/src/kdelibs/kutils/ksettings/dialog.cpp:323
#20 0x00007fb7219bb277 in KSettings::Dialog::showEvent (this=0xb437f0) at /home/test/KDE4/src/kdelibs/kutils/ksettings/dialog.cpp:120
#21 0x00007fb7225d52bc in QWidget::event () from /usr/lib64/libQtGui.so.4
#22 0x00007fb72258892d in QApplicationPrivate::notify_helper () from /usr/lib64/libQtGui.so.4
#23 0x00007fb72258ecfa in QApplication::notify () from /usr/lib64/libQtGui.so.4
#24 0x00007fb72a69dd8b in KApplication::notify (this=0x7fff33741eb0, receiver=0xb437f0, event=0x7fff33740370) at /home/test/KDE4/src/kdelibs/kdeui/kernel/kapplication.cpp:307
#25 0x00007fb72b25ee9c in QCoreApplication::notifyInternal () from /usr/lib64/libQtCore.so.4
#26 0x00007fb7225d5bc1 in QWidgetPrivate::show_helper () from /usr/lib64/libQtGui.so.4
#27 0x00007fb7225d60ea in QWidget::setVisible () from /usr/lib64/libQtGui.so.4

Hm, seen this before, there are likely duplicates of this out there. IIRC the important thing to reproduce this is to have KMail running standalone while launching Kontact.

I've not had a standalone kmail running when I've reproduced the crash :-(

The problem is that in libkpgp, the singleton Kpgp::Module::kpgpObject is not initialize/retrieved safely, hence this null pointer access.
I'm working on it.

Created attachment 28497 [details]
Ensure internally to libkpgp that the Kgpg::Module singleton is not null

Is the removal of attributes in KNMainWidget and KNGlobals ok ?
Could the Module() constructor be made private ?

SVN commit 884374 by otrichet:

Ensure the singleton Kpgp::Module::kpgpObject is correctly instanciated
 - Remove an unecessary call to Module() in kmail (used to initialize the singleton)
 - Adapt knode

CCBUG: 174707


 M  +0 -2      kmail/kmkernel.cpp  
 M  +0 -1      kmail/messagecomposer.cpp  
 M  +0 -1      kmail/messagecomposer.h  
 M  +1 -1      knode/articlewidget.cpp  
 M  +0 -1      knode/kncomposer.cpp  
 M  +0 -1      knode/knconfigwidgets.cpp  
 M  +0 -4      knode/knglobals.h  
 M  +0 -7      knode/knmainwidget.cpp  
 M  +0 -1      knode/knmainwidget.h  
 M  +1 -5      libkpgp/kpgp.cpp  
 M  +6 -2      libkpgp/kpgp.h  


WebSVN link: http://websvn.kde.org/?view=rev&revision=884374

*** Bug 167386 has been marked as a duplicate of this bug. ***

SVN commit 890871 by tmcguire:

Backport r884374 by otrichet from trunk to the 4.1 branch:

Ensure the singleton Kpgp::Module::kpgpObject is correctly instanciated
 - Remove an unecessary call to Module() in kmail (used to initialize the singleton)
 - Adapt knode

CCBUG: 174707



 M  +0 -2      kmail/kmkernel.cpp  
 M  +0 -1      kmail/messagecomposer.cpp  
 M  +0 -1      kmail/messagecomposer.h  
 M  +1 -1      knode/articlewidget.cpp  
 M  +0 -1      knode/kncomposer.cpp  
 M  +0 -1      knode/knconfigwidgets.cpp  
 M  +0 -4      knode/knglobals.h  
 M  +0 -7      knode/knmainwidget.cpp  
 M  +0 -1      knode/knmainwidget.h  
 M  +1 -5      libkpgp/kpgp.cpp  
 M  +6 -2      libkpgp/kpgp.h  


WebSVN link: http://websvn.kde.org/?view=rev&revision=890871

*** Bug 171640 has been marked as a duplicate of this bug. ***

*** Bug 178676 has been marked as a duplicate of this bug. ***