Bug 124826

Same problem here (3.5.2; Debian amd64 unstable)

#5  KWinInternal::Workspace::nextFocusChainClient (this=0x5ab420, 
    c=<value optimized out>) at tabbox.cpp:1155
#6  0x00002afad4e47393 in KWinInternal::TabBox::nextPrev (this=0x661840, 
    next=true) at tabbox.cpp:237
#7  0x00002afad4e474a4 in KWinInternal::Workspace::KDEWalkThroughWindows (
    this=0x5ab420, forward=false) at tabbox.cpp:917
#8  etc...

This occurs when there are no windows to Alt+Tab through.

Could you both attach your ~/.kde/share/config/kwinrc files please

Created attachment 15470 [details]
kwinrc

As requested...

the same happens here with 3.5.2, when trying alt+tab when there are no windows, kwin crashes.
And this is my kwinrc:

[$Version]
update_info=kwin.upd:kde3.0r1,kwin.upd:kde3.2Xinerama,kwin3_plugin.upd:kde3.2,kwin_focus1.upd:kwin_focus1,kwin_focus2.upd:kwin_focus2

[Desktops]
Name_1=
Name_2=
Name_3=
Name_4=
Number=4

[MouseBindings]
CommandActiveTitlebar1=Raise
CommandActiveTitlebar2=Lower
CommandActiveTitlebar3=Operations menu
CommandAll1=Move
CommandAll2=Toggle raise and lower
CommandAll3=Resize
CommandAllKey=Alt
CommandInactiveTitlebar1=Activate and raise
CommandInactiveTitlebar2=Activate and lower
CommandInactiveTitlebar3=Operations menu
CommandWindow1=Activate, raise and pass click
CommandWindow2=Activate and pass click
CommandWindow3=Activate and pass click

[Notification Messages]
UseTranslucency=false

[PopupInfo]
ShowPopup=false

[Style]
BorderSize=0
ButtonsOnLeft=XAI
ButtonsOnRight=M
CustomButtonPositions=false
PluginLib=kwin3_plastik
ShowToolTips=false

[TabBox]
TraverseAll=false

[Translucency]
ActiveWindowOpacity=100
ActiveWindowShadowSize=200
DockOpacity=80
DockShadowSize=50
InactiveWindowOpacity=75
InctiveWindowShadowSize=100
MovingWindowOpacity=25
RemoveShadowsOnMove=false
RemoveShadowsOnResize=false
ResetKompmgr=false
TranslucentActiveWindows=false
TranslucentDocks=true
TranslucentInactiveWindows=true
TranslucentMovingWindows=false
TreatKeepAboveAsActive=true

[Windows]
AltTabStyle=KDE
AnimateMinimize=true
AnimateMinimizeSpeed=5
AnimateShade=true
AutoRaise=off
AutoRaiseInterval=750
BorderSnapZone=10
ClickRaise=on
DelayFocus=off
DelayFocusInterval=750
ElectricBorderDelay=150
ElectricBorders=0
FocusPolicy=FocusFollowsMouse
FocusStealingPreventionLevel=1
GeometryTip=false
IgnoreFocusStealingClasses=kio_uiserver
MaximizeButtonLeftClickCommand=Maximize
MaximizeButtonMiddleClickCommand=Maximize (vertical only)
MaximizeButtonRightClickCommand=Maximize (horizontal only)
MoveMode=Opaque
Placement=Smart
ResizeMode=Opaque
RollOverDesktops=true
ShadeHover=off
ShadeHoverInterval=250
SnapOnlyWhenOverlapping=false
WindowSnapZone=10

Forgot basic info: Ubuntu, KDE 3.5.2 installed from .debs

For me on mandriva with KDE 3.5.1

[$Version]
update_info=kwin.upd:kde3.0r1,kwin.upd:kde3.2Xinerama,kwin3_plugin.upd:kde3.2,kwin_focus1.upd:kwin_focus1,kwin_focus2.upd:kwin_focus2

[Desktops]
Name_1=
Name_2=
Name_3=
Name_4=
Number=4

[Windows]
IgnoreFocusStealingClasses=kio_uiserver

Created attachment 15490 [details]
John Susi's kwinrc

Confirm on 
 Linux 2.6.15-gentoo-r1 PREEMPT Athlon(tm) XP 1800+ AuthenticAMD GNU/Linux
 KDE 3.5.2

did not happen on 3.5.1 or earliear

same problem here, KDE 3.5.2 on Gentoo. kwin crashes when pressing alt-tab and no windows exist to tab through.

My .kwinrc:

[$Version]
update_info=kwin.upd:kde3.0r1,kwin.upd:kde3.2Xinerama,kwin_focus1.upd:kwin_focus1,kwin_focus2.upd:kwin_focus2,kwin3_plugin.upd:kde3.2

[Desktops]
Name_1=
Name_2=
Name_3=
Name_4=
Number=4

[MouseBindings]
CommandActiveTitlebar2=Lower
CommandActiveTitlebar3=Operations menu

[Notification Messages]
UseTranslucency=false

[PopupInfo]
ShowPopup=false

[Style]
BorderSize=1
ButtonsOnLeft=M
ButtonsOnRight=IAX
CustomButtonPositions=true
PluginLib=kwin3_polyester
ShowToolTips=true

[TabBox]
TraverseAll=false

[Translucency]
ActiveWindowOpacity=100
ActiveWindowShadowSize=100
DockOpacity=100
DockShadowSize=0
InactiveWindowOpacity=60
InactiveWindowShadowSize=100
MovingWindowOpacity=55
OnlyDecoTranslucent=false
RemoveShadowsOnMove=false
RemoveShadowsOnResize=false
ResetKompmgr=false
TranslucentActiveWindows=true
TranslucentDocks=true
TranslucentInactiveWindows=true
TranslucentMovingWindows=true
TreatKeepAboveAsActive=true

[Windows]
AltTabStyle=KDE
AnimateMinimize=true
AnimateShade=true
AutoRaise=off
AutoRaiseInterval=750
ClickRaise=on
DelayFocus=off
DelayFocusInterval=750
FocusPolicy=FocusFollowsMouse
IgnoreFocusStealingClasses=kio_uiserver
MoveMode=Opaque
MoveResizeMaximizedWindows=true
ResizeMode=Opaque
RollOverDesktops=true
ShadeHover=true
TitlebarDoubleClickCommand=Shade

I have the same issue, kwin reliably crashes on alt+tabbing when no windows open. I didn't notice this before 3.5.2. Debian Unstable.

Backtrace
---
#6  0xb680ce85 in KWinInternal::Workspace::nextFocusChainClient ()
   from /usr/lib/libkdeinit_kwin.so
#7  0xb68190db in KWinInternal::TabBox::createClientList ()
   from /usr/lib/libkdeinit_kwin.so
#8  0xb681f7b8 in KWinInternal::TabBox::reset ()
   from /usr/lib/libkdeinit_kwin.so
#9  0xb6820020 in KWinInternal::Workspace::startKDEWalkThroughWindows ()
   from /usr/lib/libkdeinit_kwin.so
#10 0xb6840e67 in KWinInternal::Workspace::slotWalkThroughWindows ()
   from /usr/lib/libkdeinit_kwin.so
#11 0xb68569f8 in KWinInternal::Workspace::qt_invoke ()
   from /usr/lib/libkdeinit_kwin.so
#12 0xb786a5fc in KGlobalAccelPrivate::activate ()
   from /usr/lib/libkdecore.so.4
#13 0xb78c892f in KGlobalAccelPrivate::x11KeyPress ()
   from /usr/lib/libkdecore.so.4
#14 0xb78c8b6c in KGlobalAccelPrivate::x11Event ()
   from /usr/lib/libkdecore.so.4
#15 0xb78ef56f in KApplication::x11EventFilter ()
   from /usr/lib/libkdecore.so.4
#16 0xb6854c26 in KWinInternal::Application::x11EventFilter ()
   from /usr/lib/libkdeinit_kwin.so
#17 0xb7198423 in qt_set_x11_event_filter () from /usr/lib/libqt-mt.so.3
#18 0xb71a568f in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#19 0xb71bf2a2 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#20 0xb7233255 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#21 0xb723317a in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#22 0xb721938d in QApplication::exec () from /usr/lib/libqt-mt.so.3
#23 0xb68517ef in kdemain () from /usr/lib/libkdeinit_kwin.so
#24 0xb7f83524 in kdeinitmain () from /usr/lib/kde3/kwin.so


kwinrc
---
[$Version]
update_info=kwin.upd:kde3.0r1,kwin.upd:kde3.2Xinerama,kwin3_plugin.upd:kde3.2,kwin_focus1.upd:kwin_focus1,kwin_focus2.upd:kwin_focus2

[Desktops]
Name_1=
Name_2=
Name_3=
Name_4=
Number=4

[MouseBindings]
CommandActiveTitlebar1=Raise
CommandActiveTitlebar2=Lower
CommandActiveTitlebar3=Operations menu
CommandAll1=Move
CommandAll2=Toggle raise and lower
CommandAll3=Resize
CommandAllKey=Alt
CommandInactiveTitlebar1=Activate and raise
CommandInactiveTitlebar2=Activate and lower
CommandInactiveTitlebar3=Operations menu
CommandWindow1=Activate, raise and pass click
CommandWindow2=Activate and pass click
CommandWindow3=Activate and pass click

[Notification Messages]
UseTranslucency=false

[PopupInfo]
ShowPopup=false

[Style]
BorderSize=1
ButtonsOnLeft=A_M
ButtonsOnRight=X
CustomButtonPositions=true
PluginLib=kwin3_smoothblend
ShowToolTips=true

[TabBox]
TraverseAll=false

[Translucency]
ActiveWindowOpacity=100
ActiveWindowShadowSize=133
DockOpacity=80
DockShadowSize=0
InactiveWindowOpacity=80
InctiveWindowShadowSize=66
MovingWindowOpacity=25
OnlyDecoTranslucent=false
RemoveShadowsOnMove=false
RemoveShadowsOnResize=false
ResetKompmgr=false
TranslucentActiveWindows=false
TranslucentDocks=false
TranslucentInactiveWindows=false
TranslucentMovingWindows=false
TreatKeepAboveAsActive=true

[Windows]
AltTabStyle=KDE
AnimateMinimize=true
AnimateMinimizeSpeed=5
AnimateShade=true
AutoRaise=off
AutoRaiseInterval=750
BorderSnapZone=10
ClickRaise=on
DelayFocus=off
DelayFocusInterval=750
ElectricBorderDelay=150
ElectricBorders=0
FocusPolicy=ClickToFocus
FocusStealingPreventionLevel=1
GeometryTip=false
IgnoreFocusStealingClasses=kio_uiserver
MaximizeButtonLeftClickCommand=Maximize
MaximizeButtonMiddleClickCommand=Maximize (vertical only)
MaximizeButtonRightClickCommand=Maximize (horizontal only)
MoveMode=Opaque
MoveResizeMaximizedWindows=true
Placement=Smart
ResizeMode=Opaque
RollOverDesktops=true
ShadeHover=on
ShadeHoverInterval=250
SnapOnlyWhenOverlapping=false
TitlebarDoubleClickCommand=Minimize
WindowSnapZone=10

I can confirm this issue on FreeBSD 6.1-PRERELEASE/amd64 with KDE 3.5.2 as well. This issue is fixed in kwin/tabbox.cpp v.524823 [1]. I applied the change manually before recompiling kdebase, and the problem is gone.

Regards,
Aron Stansvik

[1] http://websvn.kde.org/branches/KDE/3.5/kdebase/kwin/tabbox.cpp?rev=524823&r1=514048&r2=524823

I can confirm as well. I am using ArchLinux binaries (gcc 4.0.3). 

I'd like to add that crash also occurs when restoring a minimized window using Alt+Tab. 

Issue remains after deleting kwinrc and restarting with a vanilla config.

Forgot to add: I am using 3.5.2 and did not experience the problem with 3.5.1

*** This bug has been marked as a duplicate of 124511 ***

*** Bug 126535 has been marked as a duplicate of this bug. ***