Version:            (using KDE Devel)
Installed from:    Compiled sources
Compiler:          g++ (GCC) 4.2.3 20071014 (prerelease) (Debian 4.2.2-3)
 
OS:                Linux

kppp crashes immediately on start up giving the signal SIGABRT.

The backtrace was as follows:

---------------------------------------------------------------------
Using host libthread_db library "/lib/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb60f46c0 (LWP 9229)]
[KCrash handler]
#5  0xffffe410 in __kernel_vsyscall ()
#6  0xb646a7f5 in raise () from /lib/i686/cmov/libc.so.6
#7  0xb646c181 in abort () from /lib/i686/cmov/libc.so.6
#8  0xb6463b6e in __assert_fail () from /lib/i686/cmov/libc.so.6
#9  0x0807cd13 in DebugWidget::hideEvent (this=0x818b330)
    at /home/kde-devel/kde/src/KDE/kdenetwork/kppp/debug.cpp:83
#10 0xb69700e4 in QWidget::event (this=0x818b330, event=0xbf800bfc)
    at kernel/qwidget.cpp:6323
#11 0xb691d4d7 in QApplicationPrivate::notify_helper (this=0x80e2ba8, 
    receiver=0x818b330, e=0xbf800bfc) at kernel/qapplication.cpp:3558
#12 0xb691f197 in QApplication::notify (this=0xbf801090, receiver=0x818b330, 
    e=0xbf800bfc) at kernel/qapplication.cpp:3499
#13 0xb7aac237 in KApplication::notify (this=0xbf801090, receiver=0x818b330, 
    event=0xbf800bfc)
    at /home/kde-devel/kde/src/KDE/kdelibs/kdeui/kernel/kapplication.cpp:319
#14 0xb7f07288 in QCoreApplication::notifyInternal (this=0xbf801090, 
    receiver=0x818b330, event=0xbf800bfc) at kernel/qcoreapplication.cpp:532
#15 0xb7f0a5d5 in QCoreApplication::sendEvent (receiver=0x818b330, 
    event=0xbf800bfc)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:202
#16 0xb696c8b1 in QWidgetPrivate::hide_helper (this=0x8209c48)
    at kernel/qwidget.cpp:5476
#17 0xb6974b3c in QWidget::setVisible (this=0x818b330, visible=false)
    at kernel/qwidget.cpp:5632
#18 0xb6d7d3d0 in QDialog::setVisible (this=0x818b330, visible=false)
    at dialogs/qdialog.cpp:704
#19 0x080662a8 in QWidget::hide (this=0x818b330)
    at /home/kde-devel/qt-copy/include/QtGui/../../src/gui/kernel/qwidget.h:464
#20 0x080633a8 in KPPPWidget (this=0xbf800fc4, parent=0x0, name=0x0)
    at /home/kde-devel/kde/src/KDE/kdenetwork/kppp/kpppwidget.cpp:273
#21 0x0808bd8d in main (argc=1, argv=0xbf8012b4)
    at /home/kde-devel/kde/src/KDE/kdenetwork/kppp/main.cpp:297
#0  0xffffe410 in __kernel_vsyscall ()
---------------------------------------------------------------------

This happens each time I start kppp, so it should be repeatable.

Unfortunately I don't really understand what the backtrace is saying - but hope it will be useful to someone with more experience.