[Interest] Qt 4.8 qtcreator

[Szalata, Zenon M.]

Hi all,
I have done some more testing on this.  My guess is that something changed on our RedHat Enterprise Linux 6 computers, such that the creator stopped working overnight.  It worked on 2/16/2012 just after I installed the SDK package and on 2/17/2012 it would crash with 

(gdb) bt
#0  0x00007f430af121bd in sqlite3Step ()
   from /opt/qt/qt-4.8/QtCreator/lib/qtcreator/plugins/sqldrivers/libqsqlite.so
#1  0x00007f430af0461b in sqlite3_step ()
   from /opt/qt/qt-4.8/QtCreator/lib/qtcreator/plugins/sqldrivers/libqsqlite.so
#2  0x00007f430aec680d in QSQLiteResultPrivate::fetchNext(QVector<QVariant>&, int, bool) ()
   from /opt/qt/qt-4.8/QtCreator/lib/qtcreator/plugins/sqldrivers/libqsqlite.so
#3  0x00007f430aec741c in QSQLiteResult::exec() ()
   from /opt/qt/qt-4.8/QtCreator/lib/qtcreator/plugins/sqldrivers/libqsqlite.so
#4  0x00007f430b6a1139 in QSqlQuery::exec() ()
   from /opt/qt/qt-4.8/QtCreator/lib/qtcreator/plugins/Nokia/../../libQtSql.so.4

This weekend I tried number of things.  I was no longer able to install qt with the installer: Qt_SDK_Lin64_offline_v1_2_en.run.  It would core dump as soon as the installation process started.  Unfortunately, the core dump did not have any useful information, at least nothing that would enlighten me.
What is more, I have been using Qt 4.7.0 (installed from SDK), which worked for me for a year or so.  When on 2/17/2012 I started the creator program from the 4.7.0 installation, it also no longer works, it crashes with the same back trace in the core dump as the newer one.
I am able to build a working version of Qt 4.8 and creator 2.4 from sources on these RedHat PCs.

Tuesday, I will engage our local Unix administrators, maybe they can help me understand what happened.  I am working at SLAC, which is a National Accelerator Laboratory and all Linux computers are centrally maintained.  There is a Taylor program which runs every night on these computers and does upgrades, etc. on these computers.

Thank you,
Zen

> -----Original Message-----
> From: apoe at hrz.tu-chemnitz.de [mailto:apoe at hrz.tu-chemnitz.de] On Behalf
> Of André Pönitz
> Sent: Monday, February 20, 2012 2:45 PM
> To: kai.koehne at nokia.com
> Cc: Szalata, Zenon M.; interest at qt-project.org
> Subject: Re: [Interest] Qt 4.8 qtcreator
> 
> On Mon, Feb 20, 2012 at 04:10:01PM +0000, kai.koehne at nokia.com wrote:
> > > I did some more testing and I seem to have the same problem on a number
> > > of RedHat Linux computers.
> > >
> > > The problem is:
> > >
> > > starting qtcreator is unsuccessful, it crashes with a core dump after
> printing
> > > the
> > >
> > > QPixmap::handle(): Pixmap is not an X11 class pixmap
> > >
> > > messages.
> > >
> > > I just installed qt 4.8 (SDK) and am using qtcreator that came with the SDK.
> It
> > > is a 64bit version,  I get the same problem on a 32bit Linux where I
> installed
> > > the 32bit version of the 4.8 SDK.
> >
> > Hi Zenon,
> >
> > That's looking pretty scary ...
> 
> The pixmap warning? I guess that matches QTBUG-21731/QTCREATORBUG-
> 6182 fairly well.
> 
> I don't think "fixed in 4.8" is correct, and I also think the crash is most likely
> unrelated, as I get the pixmap warning without creator crashing...
> 
> Andre'