qt4 apps segmentation fault after update

[Ivan Candelas]

After latest update of QT4 (05/07/2008), all apps using this lib are causing a segmentation fault.

[Axel Pospischil (apos)]

Can confirm this for usage with lyx-1.5.3. Program exits with

 QPaintEngine::setSystemClip: Should not be changed while engine is active
 QPaintEngine::setSystemClip: Should not be changed while engine is active
 QWidgetPrivate::beginSharedPainter: Painter is already active
 QWidgetPrivate::endSharedPainter: Attempting to end a null painter
 QPaintEngine::setSystemClip: Should not be changed while engine is active
 QPaintEngine::setSystemClip: Should not be changed while engine is active
 QWidgetPrivate::beginSharedPainter: Painter is already active
 lyx: SIGSEGV signal caught

Program starts, but
 1. Windows inside appear not in the right size (too small)
 2. Open a document causes lyx to segfault

This is a real big problem considering someone is in the middle of an important work. Imagin OpenOffice would stop working from one to the other second.

[Axel Pospischil (apos)]

Forgot to mention:
  QT Version 4.4.0-1ubuntu1~hardy1

[manuel fernandez (mfg)]

Same problem here but even worse because lyx crashes.

Importance for me is crucial or essential!

[Axel Pospischil (apos)]

This is due to enabled backports updates (unsupported).
See Bug #228067 in qt4-x11 (Ubuntu)

[Sergey Tachenov (laerel)]

I had reverse situation today. I have installed latest Hardy mainstream libqt4-gui, and every GUI application using it, including qtconfig, was crashing.
After a bit of looking at weird core dumps I suddenly decided to upgrade to version from hardy-backports. Crashes stopped. Everything is working fine now.

Strangely enough, exactly the same software on another machine is running fine. The only difference is that "fine" machine had Gutsy upgraded to Hardy, while the one crashes were happening on had fresh install of Hardy. Versions of all packages were the same on both machines.