OpenGL apps crash on start-up on HP-UX with remote X11 connection

When using a remote X11 connection, running "padnavigator" crashes at start-up on HP-UX. The same crash happens in any demo at the time OpenGL it enabled (e.g., the Affine demo).

The crash seems to be caused by use of shader programs in 4.6.

Configuration: -platform hpuxi-acc-64 -release. Test host: gravlaks. gdb reports the following backtrace:

qt@gravlaks:~/qt-everywhere-commercial-src-4.6.0/examples/graphicsview/padnavigator> gdb ./padnavigator
HP gdb 5.4.0 for HP Itanium (32 or 64 bit) and target HP-UX 11.2x.
Copyright 1986 - 2001 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 5.4.0 (based on GDB) is covered by the
GNU General Public License. Type "show copying" to see the conditions to
change it and/or distribute copies. Type "show warranty" for warranty/support.
..
(gdb) r
Starting program: /home/qt/qt-everywhere-commercial-src-4.6.0/examples/graphicsview/padnavigator/./padnavigator
QGLShaderProgram: shader programs are not supported

Program received signal SIGSEGV, Segmentation fault
si_code: 2 - SEGV_ACCERR - Invalid Permissions for object.
0x0 in <unknown_procedure> ()
(gdb) bt
#0 0x0 in <unknown_procedure> ()
warning: Attempting to unwind past bad PC 0x0
#1 0x9fffffffef54c150:0 in QGLShaderProgram::bindAttributeLocation(char const*,int)+0x110 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtOpenGL.so.4
#2 0x9fffffffef5c6120:0 in QGLEngineSharedShaders::QGLEngineSharedShaders (
this=0x6000000000021d80, context=0x6000000000080ac0)
at gl2paintengineex/qglengineshadermanager.cpp:184
#3 0x9fffffffef5c5580:0 in QGLEngineSharedShaders::QGLEngineSharedShaders(QGLContext const*)+0x30 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtOpenGL.so.4
#4 0x9fffffffef5c4bb0:0 in QGLEngineSharedShaders::shadersForContext(QGLContext const*)+0x2b0 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtOpenGL.so.4
#5 0x9fffffffef5c3e80:0 in QGLEngineShaderManager::QGLEngineShaderManager(QGLContext*)+0xf0 () at .moc/release-shared/moc_qglengineshadermanager_p.cpp:1
#6 0x9fffffffef5c3d40:0 in QGLEngineShaderManager::QGLEngineShaderManager(QGLContext*)+0x30 () at .moc/release-shared/moc_qglengineshadermanager_p.cpp:1
#7 0x9fffffffef5beca0:0 in inline qt_noop() ()
#8 0x9fffffffef5bec50:0 in QGL2PaintEngineEx::begin (this=0x600000000016a2c0,
pdev=0x60000000000a9ac0)
at gl2paintengineex/qpaintengineex_opengl2.cpp:1751
#9 0x9fffffffed1d4ef0:0 in QPainter::begin(QPaintDevice*)+0x13a0 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
--Type <return> to continue, or q <return> to quit--
#10 0x9fffffffed1a70a0:0 in QPainter::QPainter(QPaintDevice*)+0x480 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#11 0x9fffffffed1a6bd0:0 in QPainter::QPainter(QPaintDevice*)+0x30 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#12 0x9fffffffeed41500:0 in QGraphicsView::paintEvent (
this=0x9ffffffffffff200, event=0x9fffffffffffe070)
at graphicsview/qgraphicsview.cpp:3258
#13 0x9fffffffed11bb00:0 in QWidget::event (this=0x9ffffffffffff200,
event=0x9fffffffffffe070) at kernel/qwidget.cpp:8103
#14 0x9fffffffed9bb430:0 in QFrame::event(QEvent*)+0x100 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#15 0x9fffffffed9bb1e0:0 in QAbstractScrollArea::viewportEvent(QEvent*)
+0x120 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#16 0x9fffffffee5e1990:0 in QGraphicsView::viewportEvent(QEvent*)+0xda0 ()
at kernel/qwidgetcreate_x11.cpp:77
#17 0x9fffffffedf5c610:0 in QAbstractScrollAreaFilter::eventFilter(QObject*,QEvent*)+0xc0 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#18 0x9fffffffec1d75b0:0 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*,QEvent*)+0x590 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtCore.so.4
#19 0x9fffffffed878020:0 in QApplicationPrivate::notify_helper(QObject*,QEvent*)+0x450 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#20 0x9fffffffee7e3b00:0 in QApplication::notify(QObject*,QEvent*)+0x56d0 ()
--Type <return> to continue, or q <return> to quit--
at math3d/qmatrix4x4.cpp:1535
#21 0x9fffffffebdd61b0:0 in QCoreApplication::notifyInternal(QObject*,QEvent*)
+0x1f0 () at kernel/qcoreevent.cpp:293
#22 0x9fffffffed8707c0:0 in QCoreApplication::sendSpontaneousEvent(QObject*,QEvent*)+0xc0 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#23 0x9fffffffed1a4ee0:0 in QWidgetPrivate::drawWidget(QPaintDevice*,QRegion const&,QPoint const&,int,QPainter*,QWidgetBackingStore*)+0xf40 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#24 0x9fffffffed1a2b10:0 in QWidgetPrivate::repaint_sys(QRegion const&)
+0x8d0 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#25 0x9fffffffee67d8d0:0 in QWidgetPrivate::syncBackingStore()+0x60 ()
at kernel/qwidgetcreate_x11.cpp:59
#26 0x9fffffffed11c710:0 in QWidget::event (this=0x60000000000a9ab0,
event=0x600000000016c550) at kernel/qwidget.cpp:8249
#27 0x9fffffffef584190:0 in QGLWidget::event(QEvent*)+0xc00 ()
at gl2paintengineex/qgl2pexvertexarray.cpp:1
#28 0x9fffffffed8780a0:0 in QApplicationPrivate::notify_helper(QObject*,QEvent*)+0x4d0 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#29 0x9fffffffee7e3b00:0 in QApplication::notify(QObject*,QEvent*)+0x56d0 ()
at math3d/qmatrix4x4.cpp:1535
#30 0x9fffffffebdd61b0:0 in QCoreApplication::notifyInternal(QObject*,QEvent*)
+0x1f0 () at kernel/qcoreevent.cpp:293
#31 0x9fffffffebfd6cc0:0 in QCoreApplication::sendEvent(QObject*,QEvent*)
--Type <return> to continue, or q <return> to quit--
+0xa0 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtCore.so.4
#32 0x9fffffffebfd58c0:0 in QCoreApplicationPrivate::sendPostedEvents(QObject*,int,QThreadData*)+0x760 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtCore.so.4
#33 0x9fffffffebfef4a0:0 in QCoreApplication::sendPostedEvents(QObject*,int)
+0x60 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtCore.so.4
#34 0x9fffffffee5ed170:0 in QGraphicsViewPrivate::dispatchPendingUpdateRequests()+0x90 () at kernel/qwidgetcreate_x11.cpp:77
#35 0x9fffffffee5ebb50:0 in QGraphicsScenePrivate::_q_emitUpdated()+0x520 ()
at kernel/qwidgetcreate_x11.cpp:77
#36 0x9fffffffed193f20:0 in QGraphicsScene::qt_metacall(QMetaObject::Call,int,void**)+0x440 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#37 0x9fffffffebee7da0:0 in QMetaObject::metacall(QObject*,QMetaObject::Call,int,void**)+0x160 () at kernel/qcoreevent.cpp:293
#38 0x9fffffffebeec890:0 in QMetaCallEvent::placeMetaCall (
this=0x6000000000021ea0, object=0x6000000000080b20)
at kernel/qobject.cpp:562
#39 0x9fffffffebcb46c0:0 in QObject::event (this=0x6000000000080b20,
e=0x6000000000021ea0) at kernel/qobject.cpp:1240
#40 0x9fffffffee626400:0 in QGraphicsScene::event(QEvent*)+0x1d90 ()
at kernel/qwidgetcreate_x11.cpp:77
#41 0x9fffffffed8780a0:0 in QApplicationPrivate::notify_helper(QObject*,QEvent*)--Type <return> to continue, or q <return> to quit--
+0x4d0 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#42 0x9fffffffee7dee40:0 in QApplication::notify(QObject*,QEvent*)+0xa10 ()
at math3d/qmatrix4x4.cpp:1535
#43 0x9fffffffebdd61b0:0 in QCoreApplication::notifyInternal(QObject*,QEvent*)
+0x1f0 () at kernel/qcoreevent.cpp:293
#44 0x9fffffffebfd6cc0:0 in QCoreApplication::sendEvent(QObject*,QEvent*)
+0xa0 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtCore.so.4
#45 0x9fffffffebfd58c0:0 in QCoreApplicationPrivate::sendPostedEvents(QObject*,int,QThreadData*)+0x760 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtCore.so.4
#46 0x9fffffffebfef4a0:0 in QCoreApplication::sendPostedEvents(QObject*,int)
+0x60 () from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtCore.so.4
#47 0x9fffffffeec94a70:0 in QCoreApplication::sendPostedEvents()+0x30 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#48 0x9fffffffeec937c0:0 in QEventDispatcherX11::processEvents (
this=0x600000000000cea0, flags=0x9ffffffffffff1a4)
at kernel/qeventdispatcher_x11.cpp:75
#49 0x9fffffffebfef320:0 in QEventLoop::processEvents (
this=0x9ffffffffffff1e0, flags=0x9ffffffffffff1b0)
at kernel/qeventloop.cpp:149
#50 0x9fffffffebfea3f0:0 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)+0x400 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtCore.so.4
--Type <return> to continue, or q <return> to quit--
#51 0x9fffffffec2c4e90:0 in QCoreApplication::exec()+0x500 ()
at kernel/qsocketnotifier.cpp:1
#52 0x9fffffffeeddbe00:0 in QApplication::exec()+0x50 ()
from /home/qt/qt-everywhere-commercial-src-4.6.0/lib/libQtGui.so.4
#53 0x400000000001f790:0 in main (argc=1, argv=0x9ffffffffffff738)
at main.cpp:58
(gdb)