systemsettings crashes (SIGSEGV) on start after Hardy RC upgrade

[Thilo-Alexander Ginkel]

Since upgrading to Kubuntu 8.04 (Hardy) systemsettings just crashes prior to showing any window. Backtrace:

[Thread debugging using libthread_db enabled]
[New Thread 0x7f2ca50a96f0 (LWP 16035)]
[KCrash handler]
#5 KcmSearch (this=0x75af80, moduleViewList=0x6997d8, parent=0x75a740,
    name=0x4212d3 "search") at /usr/share/qt3/include/qvaluelist.h:565
#6 0x000000000041e25e in MainWindow::buildActions (this=0x699680)
    at /build/buildd/kde-systemsettings-0.0svn20070312/./systemsettings/mainwindow.cpp:129
#7 0x000000000041ec01 in MainWindow (this=0x699680, embed=true,
    menuFile=@0x7fffad0da330, parent=0x0, name=<value optimized out>)
    at /build/buildd/kde-systemsettings-0.0svn20070312/./systemsettings/mainwindow.cpp:65
#8 0x000000000041c762 in main (argc=<value optimized out>,
    argv=<value optimized out>)
    at /build/buildd/kde-systemsettings-0.0svn20070312/./systemsettings/main.cpp:56

[Thilo-Alexander Ginkel (thilo.ginkel)]

Some observations from a brief gdb session, which produces a slightly more verbose stack trace:

Program received signal SIGSEGV, Segmentation fault.
0x000000000041c06a in QValueList<RowIconView*>::detach (this=0xd0)
    at /usr/share/qt3/include/qvaluelist.h:565
565 void detach() { if ( sh->count > 1 ) detachInternal(); }

(gdb) backtrace
#0 0x000000000041c06a in QValueList<RowIconView*>::detach (this=0xd0)
    at /usr/share/qt3/include/qvaluelist.h:565
#1 0x000000000041c2e5 in QValueList<RowIconView*>::operator[] (this=0xd0, i=0)
    at /usr/share/qt3/include/qvaluelist.h:539
#2 0x000000000041b7e3 in KcmSearch (this=0x769a80, moduleViewList=0x6a37b8,
    parent=0x769240, name=0x428852 "search") at kcmsearch.cpp:31
#3 0x000000000042238d in MainWindow::buildActions (this=0x6a3660)
    at mainwindow.cpp:129
#4 0x0000000000423664 in MainWindow (this=0x6a3660, embed=true,
    menuFile=@0x7fff20aebcb0, parent=0x0, name=0x0) at mainwindow.cpp:65
#5 0x00000000004209b1 in main (argc=1, argv=0x7fff20aebf68) at main.cpp:56

[Thilo-Alexander Ginkel (thilo.ginkel)]

I was able to fix the issue as per the instructions at https://bugs.launchpad.net/ubuntu/+source/kde-systemsettings/+bug/114286/comments/13, so I am flagging this as a duplicate of bug # 114286.

However, the problem for some reason re-surfaced with Hardy although bug # 114286 is marked as "Fix Released" for Gutsy...