ASSERT failure in QList<T>::at: "index out of range", file ../../include/QtCore/../../src/corelib/tools/qlist.h, line 386

Program received signal SIGABRT, Aborted.
[Switching to Thread 47593100069216 (LWP 21179)]
0x00002b491db04765 in raise () from /lib/libc.so.6
(gdb) where
#0  0x00002b491db04765 in raise () from /lib/libc.so.6
#1  0x00002b491db061c0 in abort () from /lib/libc.so.6
#2  0x00002b491bc91ff8 in qt_message_output () from /usr/lib/libQtCore.so.4
#3  0x00002b491bc92119 in qFatal () from /usr/lib/libQtCore.so.4
#4  0x00002b491bc9216c in qt_assert_x () from /usr/lib/libQtCore.so.4
#5  0x00002b491b2ed23e in ?? () from /usr/lib/libQtGui.so.4
#6  0x00002b491b7197d7 in ?? () from /usr/lib/libQtGui.so.4
#7  0x00002b491b824a46 in ?? () from /usr/lib/libQtGui.so.4
#8  0x00002b491bd56551 in QMetaCallEvent::placeMetaCall () from /usr/lib/libQtCore.so.4
#9  0x00002b491bd5b42f in QObject::event () from /usr/lib/libQtCore.so.4
#10 0x00002b491b2bfd51 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#11 0x00002b491b2c0070 in QApplication::notify () from /usr/lib/libQtGui.so.4
#12 0x00000000007ac206 in ?? ()
#13 0x00002b491bd49846 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#14 0x00002b491bd4ca6d in ?? () from /usr/lib/libQtCore.so.4
#15 0x00002b491bd49d94 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#16 0x00002b491bd49ef0 in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#17 0x00002b491bd71991 in ?? () from /usr/lib/libQtCore.so.4
#18 0x00002b491ed32fd3 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#19 0x00002b491ed362dd in ?? () from /usr/lib/libglib-2.0.so.0
#20 0x00002b491ed3680e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#21 0x00002b491bd70f4e in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#22 0x00002b491b350e07 in ?? () from /usr/lib/libQtGui.so.4
#23 0x00002b491bd46b31 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#24 0x00002b491bd46c86 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#25 0x00002b491b6f5de8 in QDialog::exec () from /usr/lib/libQtGui.so.4
#26 0x000000000077aabc in ?? ()
#27 0x0000000000544a96 in ?? ()
#28 0x0000000000548f6a in ?? ()
#29 0x00000000008b7435 in ?? ()
#30 0x00000000008b74bf in ?? ()
#31 0x00002b491bd5a770 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#32 0x00002b491bd5a969 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#33 0x00002b491b2b89ab in QAction::triggered () from /usr/lib/libQtGui.so.4
#34 0x00002b491b2ba4b8 in QAction::activate () from /usr/lib/libQtGui.so.4
#35 0x00002b491b2bde92 in ?? () from /usr/lib/libQtGui.so.4
#36 0x00002b491b6b809e in QToolButton::nextCheckState () from /usr/lib/libQtGui.so.4
#37 0x00002b491b5f0006 in ?? () from /usr/lib/libQtGui.so.4
#38 0x00002b491b5f02ce in QAbstractButton::mouseReleaseEvent () from /usr/lib/libQtGui.so.4
#39 0x00002b491b6b9200 in QToolButton::mouseReleaseEvent () from /usr/lib/libQtGui.so.4
#40 0x00002b491b30c5d9 in QWidget::event () from /usr/lib/libQtGui.so.4
#41 0x00002b491b5eedff in QAbstractButton::event () from /usr/lib/libQtGui.so.4
#42 0x00002b491b6b8055 in QToolButton::event () from /usr/lib/libQtGui.so.4
#43 0x00002b491b2bfd51 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#44 0x00002b491b2c0949 in QApplication::notify () from /usr/lib/libQtGui.so.4
#45 0x00000000007ac206 in ?? ()
#46 0x00002b491bd49846 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#47 0x00002b491b2cae73 in ?? () from /usr/lib/libQtGui.so.4
#48 0x00002b491b325742 in ?? () from /usr/lib/libQtGui.so.4
#49 0x00002b491b323239 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#50 0x00002b491b351599 in ?? () from /usr/lib/libQtGui.so.4
#51 0x00002b491ed32fd3 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#52 0x00002b491ed362dd in ?? () from /usr/lib/libglib-2.0.so.0
#53 0x00002b491ed3680e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#54 0x00002b491bd70f4e in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#55 0x00002b491b350e07 in ?? () from /usr/lib/libQtGui.so.4
#56 0x00002b491bd46b31 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#57 0x00002b491bd46c86 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#58 0x00002b491bd49ffc in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#59 0x00002b491b2bf928 in QApplication::exec () from /usr/lib/libQtGui.so.4
#60 0x000000000053429f in ?? ()
#61 0x000000000042f353 in ?? ()
#62 0x00002b491daf0b44 in __libc_start_main () from /lib/libc.so.6
#63 0x000000000042f209 in ?? ()
#64 0x00007fff8fbbb3e8 in ?? ()
#65 0x0000000000000000 in ?? ()