plasma-desktop crashed in QGraphicsScene::drawItems() hovering over a file without permissions

[mousike1981]

Binary package hint: kdebase-workspace

the screen often becomes black, instead of transparent, in some particular effects...for example when rebooting, logging out or shutting down, or when playing around with plasma objects/widgets

ProblemType: Crash
Architecture: amd64
Date: Sat Oct 17 13:42:47 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/plasma-desktop
Package: kdebase-workspace-bin 4:4.3.2-0ubuntu5
ProcCmdline: plasma-desktop --nocrashhandler
ProcEnviron:
 LANGUAGE=it_IT:it:en_GB:en
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SegvAnalysis:
 Segfault happened at: 0x7f2346321560 <_ZN14QGraphicsScene9drawItemsEP8QPainteriPP13QGraphicsItemPK24QStyleOptionGraphicsItemP7QWidget+416>: movzbl 0x52(%rax),%eax
 PC (0x7f2346321560) ok
 source "0x52(%rax)" (0xc00064008a) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: kdebase-workspace
StacktraceTop:
 QGraphicsScene::drawItems(QPainter*, int, QGraphicsItem**, QStyleOptionGraphicsItem const*, QWidget*) ()
 QGraphicsView::paintEvent(QPaintEvent*) ()
 QWidget::event(QEvent*) ()
 QFrame::event(QEvent*) ()
 QGraphicsView::viewportEvent(QEvent*) ()
Title: plasma-desktop crashed with SIGSEGV in QGraphicsScene::drawItems()
Uname: Linux 2.6.31-14-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:QGraphicsScene::drawItems ()
QGraphicsView::paintEvent ()
QWidget::event () from /usr/lib/libQtGui.so.4
QFrame::event () from /usr/lib/libQtGui.so.4
QGraphicsView::viewportEvent ()

[Jonathan Thomas (echidnaman)]

This problem is caused (or at least exposed) by our kubuntu_20_folderview_retry.diff patch which forces folderview to retry listing the directory upon failure. This was to make sure the directory got listed on low-memory systems on the Live CD, but in the case of where folderview has a good reason that listing the directory failed (permissions...) it causes a nice crash by forcing the retry. I have removed this patch in bzr, and this crash should be fixed next upload. We will see how things go for the low-memory systems that this patch was made for during the Kubuntu 9.10 RC -> final release period.

[Launchpad Janitor (janitor)]

This bug was fixed in the package kdebase - 4:4.3.2-0ubuntu3

---------------
kdebase (4:4.3.2-0ubuntu3) karmic; urgency=low

  * Drop kubuntu_12_folderview_retry.diff, fixes LP: #453874

 -- Jonathan Thomas <email address hidden> Tue, 20 Oct 2009 11:36:09 -0400