Plasma task bar crashes when selecting a task

[LarsIvarIgesund]

Binary package hint: plasma-desktop

This has happened twice today - I selected a browser window (konqueror) to show
from the task bar, and it crashed.

This has not happened earlier in the lucid beta cycle.

[Harald Sitter (apachelogger)]

Closing in favor of upstream bug report. Please refer there for status updates.
Thanks.

[LarsIvarIgesund (larsivar)]

Application: plasma-desktop (0.3)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-18-generic i686
Distribution: Ubuntu lucid (development branch)

-- Information about the crash:
This has happened twice today - I selected a browser window (konqueror) to show from the task bar, and it crashed.

Note that I am running KDE 4.4.2 on Kubuntu Lucid (10.04).

The crash can be reproduced some of the time.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Aborted
[Current thread is 1 (Thread 0xb7792aa0 (LWP 2636))]

Thread 2 (Thread 0xa9ee8b70 (LWP 2647)):
#0 0x00978422 in __kernel_vsyscall ()
#1 0x01b78cc3 in ?? () from /lib/tls/i686/cmov/libc.so.6
#2 0x01b0f687 in ?? () from /lib/tls/i686/cmov/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0xb7792aa0 (LWP 2636)):
[KCrash Handler]
#6 0x00978422 in __kernel_vsyscall ()
#7 0x01ac8641 in raise () from /lib/tls/i686/cmov/libc.so.6
#8 0x01acba72 in abort () from /lib/tls/i686/cmov/libc.so.6
#9 0x01b09784 in ?? () from /lib/tls/i686/cmov/libc.so.6
#10 0x01b0c436 in ?? () from /lib/tls/i686/cmov/libc.so.6
#11 0x01b0df8c in malloc () from /lib/tls/i686/cmov/libc.so.6
#12 0x0038e601 in ?? () from /lib/libz.so.1
#13 0x0038aa89 in deflateInit2_ () from /lib/libz.so.1
#14 0x0038ac02 in deflateInit_ () from /lib/libz.so.1
#15 0x00386f2d in compress2 () from /lib/libz.so.1
#16 0x00622085 in qCompress (
    data=0x9c1ec08 "\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377\001\001\001\377"..., nbytes=29162014, compressionLevel=-1) at tools/qbytearray.cpp:467
#17 0x00fed0ad in KPixmapCache::Private::writeData (this=0x91d1bb8, key=..., pix=...) at ../../kdeui/util/kpixmapcache.cpp:1475
#18 0x00fede1e in KPixmapCache::insert (this=0x91c65e8, key=..., pix=...) at ../../kdeui/util/kpixmapcache.cpp:1440
#19 0x0832ecea in Plasma::ThemePrivate::scheduledCacheUpdate (this=0x91ca9c0) at ../../plasma/theme.cpp:242
#20 0x083330a6 in Plasma::Theme::qt_metacall (this=0x91c3bf0, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xbfa952dc) at ./theme.moc:111
#21 0x00723c9a in QMetaObject::metacall (object=0x91c3bf0, cl=2636, idx=9, argv=0xbfa952dc) at kernel/qmetaobject.cpp:237
#22 0x007323d5 in QMetaObject::activate (sender=0x91cd3c8, m=0x8325a4, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3293
#23 0x00783aa7 in QTimer::timeout (this=0x91cd3c8) at .moc/release-shared/moc_qtimer.cpp:134
#...

[Dario Andres (andresbajotierra)]

Looks like some problem in the theme cache. (related to bug 218998/ bug 209263)

As a possible workaround, you may want to try to cleanup your
"/var/tmp/kdecache-USERNAME/kpc/" directory.

Regards

[Christoph-maxiom (christoph-maxiom)]

Plasma::Theme no longer uses KPixmapCache, so this crash can no longer happen.