Trace from the core dump (with qt enabled with dbg symbols):
root@ubuntu-desktop:/home/ubuntu/qt5/snowshoe-1.0~git+20120608# gdb ./snowshoe core
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "arm-linux-gnueabihf".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /home/ubuntu/qt5/snowshoe-1.0~git+20120608/snowshoe...done.
[New LWP 8591]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
Core was generated by `./snowshoe'.
Program terminated with signal 11, Segmentation fault.
#0 0xb2453698 in QXcbConnection::initializeXFixes (this=0x210bc70) at qxcbconnection.cpp:1045
1045 xfixes_first_event = reply->first_event;
(gdb) l
1040
1041 void QXcbConnection::initializeXFixes()
1042 {
1043 xcb_generic_error_t *error = 0;
1044 const xcb_query_extension_reply_t *reply = xcb_get_extension_data(m_connection, &xcb_xfixes_id);
1045 xfixes_first_event = reply->first_event;
1046
1047 xcb_xfixes_query_version_cookie_t xfixes_query_cookie = xcb_xfixes_query_version(m_connection,
1048 XCB_XFIXES_MAJOR_VERSION,
1049 XCB_XFIXES_MINOR_VERSION);
(gdb) bt full
#0 0xb2453698 in QXcbConnection::initializeXFixes (this=0x210bc70) at qxcbconnection.cpp:1045 xfixes_query_cookie = {sequence = 0} xfixes_query = 0xffffffff __PRETTY_FUNCTION__ = "void QXcbConnection::initializeXFixes()"
error = 0x0
reply = 0x0
#1 0xb2451d70 in QXcbConnection::QXcbConnection (this=0x210bc70, nativeInterface=0x210bc08, displayName=0x0) at qxcbconnection.cpp:180
dpy = 0x210bf38
it = {data = 0x211286c, rem = 0, index = 1632} screenNumber = 2
#2 0xb24558ac in QXcbIntegration::QXcbIntegration (this=0x21047e8, parameters=...) at qxcbintegration.cpp:101
No locals.
#3 0xb24663be in QXcbIntegrationPlugin::create (this=0x21005e8, system=..., parameters=...) at main.cpp:66
No locals.
#4 0xb49db386 in qLoadPlugin1<QPlatformIntegration, QPlatformIntegrationFactoryInterface, QStringList> (loader=0x2100408, key=..., parameter1=...)
at ../../include/QtCore/5.0.0/QtCore/private/../../../../../src/corelib/plugin/qfactoryloader_p.h:118
result = 0xbecd8650
factory = 0x21005f0 factoryObject = 0x21005e8
index = 3
#5 0xb49dac0e in QPlatformIntegrationFactory::create (key=..., platformPluginPath=...) at kernel/qplatformintegrationfactory_qpa.cpp:72
ret = 0xbecd8464
paramList = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}},
d = 0x21003b0}, d = 0x21003b0}}, <No data fields>}
platform = {static null = {<No data fields>}, d = 0x2100390}
#6 0xb49e0570 in init_platform (pluginArgument=..., platformPluginPath=...) at kernel/qguiapplication.cpp:629
name = {static null = {<No data fields>}, d = 0x2100390}
arguments = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}},
d = 0xb478ece8}, d = 0xb478ece8}}, <No data fields>} __PRETTY_FUNCTION__ = "void init_platform(const QString&, const QString&)"
themeNames = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}},
d = 0xbecd84e8}, d = 0xbecd84e8}}, <No data fields>}
#7 0xb49e110a in QGuiApplicationPrivate::createPlatformIntegration (this=0x20ff968) at kernel/qguiapplication.cpp:753 platformPluginPath = {static null = {<No data fields>}, d = 0xb478d16c} platformName = {d = 0x20ff898} platformNameEnv = {d = 0xb478d0b4}
j = 1
#8 0xb49e11b8 in QGuiApplicationPrivate::createEventDispatcher (this=0x20ff968) at kernel/qguiapplication.cpp:760
No locals.
#9 0xb4eadb40 in QApplicationPrivate::createEventDispatcher (this=0x20ff968) at kernel/qapplication_qpa.cpp:90
No locals.
#10 0xb46de0d0 in QCoreApplication::init (this=0xbecd8650) at kernel/qcoreapplication.cpp:567
d = 0x20ff968
#11 0xb46ddf40 in QCoreApplication::QCoreApplication (this=0xbecd8650, p=...) at kernel/qcoreapplication.cpp:508
No locals.
#12 0xb49dfb12 in QGuiApplication::QGuiApplication (this=0xbecd8650, p=...) at kernel/qguiapplication.cpp:342
No locals.
#13 0xb4e427c4 in QApplication::QApplication (this=0xbecd8650, argc=@0xbecd864c: 1, argv=0xbecd8824, _internal=327680) at kernel/qapplication.cpp:554
No locals.
#14 0x00011380 in main (argc=1, argv=0xbecd8824) at main.cpp:35
app = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0xb493ca88, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0xb4816e28, data = 0xb4816f00, static_metacall = 0xb47125c5 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x20ff968}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0xb4890300, data = 0xb4897bb8, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = { superdata = 0x1e6780, stringdata = 0xb4813c98, data = 0xb4813dec, static_metacall = 0xb46e0ffd <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, static self = 0xbecd8650}, static staticMetaObject = {d = {superdata = 0xb493ca48, stringdata = 0xb4c738b4, data = 0xb4c73a7c, static_metacall = 0xb49e5395 <QGuiApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0xb4d112d8, stringdata = 0xb521013c,
data = 0xb5210418, static_metacall = 0xb4e4ae3d <QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
arguments = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}},
d = 0x3}, d = 0x3}}, <No data fields>}
window = <optimized out>
fullScreen = <optimized out>
And output from X11:
Backtrace:
Segmentation fault at address 0x68
Caught signal 11 (Segmentation fault). Server aborting
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
Please also check the log file at "/var/log/Xorg.0.log" for additional information.
Trace from the core dump (with qt enabled with dbg symbols):
root@ubuntu- desktop: /home/ubuntu/ qt5/snowshoe- 1.0~git+ 20120608# gdb ./snowshoe core 04-0ubuntu2) 7.4-2012.04 gnu.org/ licenses/ gpl.html> gnueabihf" . bugs.launchpad. net/gdb- linaro/>... qt5/snowshoe- 1.0~git+ 20120608/ snowshoe. ..done. linux-gnueabihf /libthread_ db.so.1" . :initializeXFix es (this=0x210bc70) at qxcbconnection. cpp:1045 :initializeXFix es() extension_ reply_t *reply = xcb_get_ extension_ data(m_ connection, &xcb_xfixes_id); query_version_ cookie_ t xfixes_query_cookie = xcb_xfixes_ query_version( m_connection, MAJOR_VERSION, MINOR_VERSION) ; :initializeXFix es (this=0x210bc70) at qxcbconnection. cpp:1045
xfixes_ query_cookie = {sequence = 0}
xfixes_ query = 0xffffffff
__PRETTY_ FUNCTION_ _ = "void QXcbConnection: :initializeXFix es()" :QXcbConnection (this=0x210bc70, nativeInterface =0x210bc08, displayName=0x0) at qxcbconnection. cpp:180
screenNumber = 2 ::QXcbIntegrati on (this=0x21047e8, parameters=...) at qxcbintegration .cpp:101 Plugin: :create (this=0x21005e8, system=..., parameters=...) at main.cpp:66 QPlatformIntegr ation, QPlatformIntegr ationFactoryInt erface, QStringList> (loader=0x2100408, key=..., parameter1=...) QtCore/ 5.0.0/QtCore/ private/ ../../. ./../.. /src/corelib/ plugin/ qfactoryloader_ p.h:118
factoryObject = 0x21005e8 ationFactory: :create (key=..., platformPluginP ath=... ) at kernel/ qplatformintegr ationfactory_ qpa.cpp: 72 =..., platformPluginP ath=... ) at kernel/ qguiapplication .cpp:629
__PRETTY_ FUNCTION_ _ = "void init_platform(const QString&, const QString&)" Private: :createPlatform Integration (this=0x20ff968) at kernel/ qguiapplication .cpp:753
platformPlugin Path = {static null = {<No data fields>}, d = 0xb478d16c}
platformName = {d = 0x20ff898}
platformNameEn v = {d = 0xb478d0b4} Private: :createEventDis patcher (this=0x20ff968) at kernel/ qguiapplication .cpp:760 vate::createEve ntDispatcher (this=0x20ff968) at kernel/ qapplication_ qpa.cpp: 90 n::init (this=0xbecd8650) at kernel/ qcoreapplicatio n.cpp:567 n::QCoreApplica tion (this=0xbecd8650, p=...) at kernel/ qcoreapplicatio n.cpp:508 ::QGuiApplicati on (this=0xbecd8650, p=...) at kernel/ qguiapplication .cpp:342 :QApplication (this=0xbecd8650, argc=@0xbecd864c: 1, argv=0xbecd8824, _internal=327680) at kernel/ qapplication. cpp:554
stringdat a = 0xb4816e28, data = 0xb4816f00,
static_ metacall = 0xb47125c5 <QObject: :qt_static_ metacall( QObject* , QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0,
extradata = 0x0}}, d_ptr = {d = 0x20ff968}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0xb4890300,
data = 0xb4897bb8, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {
superdata = 0x1e6780, stringdata = 0xb4813c98, data = 0xb4813dec,
static_ metacall = 0xb46e0ffd <QCoreApplicati on::qt_ static_ metacall( QObject* , QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0,
extradata = 0x0}}, static self = 0xbecd8650}, static staticMetaObject = {d = {superdata = 0xb493ca48, stringdata = 0xb4c738b4,
data = 0xb4c73a7c, static_metacall = 0xb49e5395 <QGuiApplicatio n::qt_static_ metacall( QObject* , QMetaObject::Call, int, void**)>,
relatedMetaOb jects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0xb4d112d8, stringdata = 0xb521013c, :qt_static_ metacall( QObject* , QMetaObject::Call, int, void**)>,
relatedMetaObje cts = 0x0, extradata = 0x0}}}
GNU gdb (Ubuntu/Linaro 7.4-2012.
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "arm-linux-
For bug reporting instructions, please see:
<http://
Reading symbols from /home/ubuntu/
[New LWP 8591]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-
Core was generated by `./snowshoe'.
Program terminated with signal 11, Segmentation fault.
#0 0xb2453698 in QXcbConnection:
1045 xfixes_first_event = reply->first_event;
(gdb) l
1040
1041 void QXcbConnection:
1042 {
1043 xcb_generic_error_t *error = 0;
1044 const xcb_query_
1045 xfixes_first_event = reply->first_event;
1046
1047 xcb_xfixes_
1048 XCB_XFIXES_
1049 XCB_XFIXES_
(gdb) bt full
#0 0xb2453698 in QXcbConnection:
error = 0x0
reply = 0x0
#1 0xb2451d70 in QXcbConnection:
dpy = 0x210bf38
it = {data = 0x211286c, rem = 0, index = 1632}
#2 0xb24558ac in QXcbIntegration
No locals.
#3 0xb24663be in QXcbIntegration
No locals.
#4 0xb49db386 in qLoadPlugin1<
at ../../include/
result = 0xbecd8650
factory = 0x21005f0
index = 3
#5 0xb49dac0e in QPlatformIntegr
ret = 0xbecd8464
paramList = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}},
d = 0x21003b0}, d = 0x21003b0}}, <No data fields>}
platform = {static null = {<No data fields>}, d = 0x2100390}
#6 0xb49e0570 in init_platform (pluginArgument
name = {static null = {<No data fields>}, d = 0x2100390}
arguments = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}},
d = 0xb478ece8}, d = 0xb478ece8}}, <No data fields>}
themeNames = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}},
d = 0xbecd84e8}, d = 0xbecd84e8}}, <No data fields>}
#7 0xb49e110a in QGuiApplication
j = 1
#8 0xb49e11b8 in QGuiApplication
No locals.
#9 0xb4eadb40 in QApplicationPri
No locals.
#10 0xb46de0d0 in QCoreApplicatio
d = 0x20ff968
#11 0xb46ddf40 in QCoreApplicatio
No locals.
#12 0xb49dfb12 in QGuiApplication
No locals.
#13 0xb4e427c4 in QApplication:
No locals.
#14 0x00011380 in main (argc=1, argv=0xbecd8824) at main.cpp:35
app = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0xb493ca88, static staticMetaObject = {d = {superdata = 0x0,
data = 0xb5210418, static_metacall = 0xb4e4ae3d <QApplication:
arguments = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}},
d = 0x3}, d = 0x3}}, <No data fields>}
window = <optimized out>
fullScreen = <optimized out>
And output from X11:
Backtrace:
Segmentation fault at address 0x68
Caught signal 11 (Segmentation fault). Server aborting
Please consult the The X.Org Foundation support wiki.x. org Xorg.0. log" for additional information.
at http://
for help.
Please also check the log file at "/var/log/