sbar@laptop ~ $ gdb -silent --eval-command=r --eval-command=bt designer
Reading symbols from /usr/bin/designer...Reading symbols from /usr/lib64/debug/usr/bin/designer.debug...done.
done.
Starting program: /usr/bin/designer
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffec14c700 (LWP 16284)]
Application asked to unregister timer 0xa000003 which is not registered in this thread. Fix application.
Application asked to unregister timer 0xe000002 which is not registered in this thread. Fix application.

Program received signal SIGSEGV, Segmentation fault.
QRegion::~QRegion (this=0xd099a0, __in_chrg=<value optimized out>)
    at painting/qregion.cpp:3919
3919    painting/qregion.cpp: No such file or directory.
        in painting/qregion.cpp
#0  QRegion::~QRegion (this=0xd099a0, __in_chrg=<value optimized out>)
    at painting/qregion.cpp:3919
#1  0x00007ffff0b7ada3 in QGraphicsViewPrivate::~QGraphicsViewPrivate (this=0xd09510,
    __in_chrg=<value optimized out>)
    at ../../include/QtGui/private/../../../src/gui/graphicsview/qgraphicsview_p.h:69
#2  0x00007ffff0b7b292 in QDeclarativeViewPrivate::~QDeclarativeViewPrivate (
    this=0xd09510, __in_chrg=<value optimized out>) at util/qdeclarativeview.cpp:136
#3  0x00007ffff5c3634c in QObject::~QObject() () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007ffff64a5b2d in QWidget::~QWidget (this=0xcfe140,
    __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1651
#5  0x00007ffff681a3de in QFrame::~QFrame (this=0xd099a0, __in_chrg=<value optimized out>)
    at widgets/qframe.cpp:242
#6  0x00007ffff68a2280 in QAbstractScrollArea::~QAbstractScrollArea (this=0xcfe140,
    __in_chrg=<value optimized out>) at widgets/qabstractscrollarea.cpp:526
#7  0x00007ffff6a3a3fd in QGraphicsView::~QGraphicsView (this=0xcfe140,
    __in_chrg=<value optimized out>) at graphicsview/qgraphicsview.cpp:1165
---Type <return> to continue, or q <return> to quit---
#8  0x00007ffff0b780b6 in QDeclarativeView::~QDeclarativeView (this=0xd099a0,
    __in_chrg=<value optimized out>) at util/qdeclarativeview.cpp:301
#9  0x00007ffff73d7c07 in qdesigner_internal::WidgetDataBase::defaultPropertyValues (
    this=<value optimized out>, name=...) at shared/widgetdatabase.cpp:460
#10 0x00007ffff73d7cbd in qdesigner_internal::WidgetDataBase::grabDefaultPropertyValues (
    this=0x6dc240) at shared/widgetdatabase.cpp:469
#11 0x00007ffff73a14c2 in qdesigner_internal::QDesignerIntegration::initializePlugins (
    formEditor=0x6cd310) at shared/qdesigner_integration.cpp:366
#12 0x00007ffff79abbe1 in QDesignerComponents::initializePlugins (core=0xd099a0)
    at qdesigner_components.cpp:142
#13 0x0000000000435171 in QDesignerWorkbench::QDesignerWorkbench (this=0x6c1370)
    at qdesigner_workbench.cpp:192
#14 0x000000000042de23 in QDesigner::initialize (this=0x7fffffffd850) at qdesigner.cpp:243
#15 0x000000000042e313 in QDesigner::QDesigner (this=0x7fffffffd850,
    argc=<value optimized out>, argv=<value optimized out>) at qdesigner.cpp:99
#16 0x000000000042cb2f in main (argc=1, argv=0x7fffffffd988) at main.cpp:54
(gdb)