[Kde-pim] Segfault calling EntityTree::headerData()
Eduardo Robles Elvira
edulix at gmail.com
Sun Jul 26 19:14:24 BST 2009
Hello PIM people and specially Stephen Kelly :P
I've created my own model which inherits EntityTreeModel. In my code,
I do something like this:
QVariant KonqBookmarkModel::headerData( int section, Qt::Orientation
orientation, int role ) const
{
if ( role == Qt::DisplayRole && orientation == Qt::Horizontal )
{
switch( section )
{
case Title:
return i18nc( "@title:column, bookmark title", "Title" );
case Url:
return i18nc( "@title:column, bookmark address", "Address" );
case UniqueUri:
return i18nc( "@title:column, unique uri", "Uri" );
case Tags:
return i18nc( "@title:column, tags", "Tags" );
case Description:
return i18nc( "@title:column, description", "Description" );
case NumVisits:
return i18nc( "@title:column, visits counter", "Visits Counter" );
case Created:
return i18nc( "@title:column, created", "Created" );
case LastModified:
return i18nc( "@title:column, last modified", "Last Modified" );
case LastVisited:
return i18nc( "@title:column, last visited", "Last Visited" );
default:
return QString();
}
}
return EntityTreeModel::headerData( section, orientation, role );
}
My akonadi-based bookmarks organizer is crashing on the above call to
EntityTreeModel::headerData(). Here we can see the code of that
method:
QVariant EntityTreeModel::headerData( int section, Qt::Orientation
orientation, int role ) const
{
const int headerSet = (role / TerminalUserRole);
role %= TerminalUserRole;
return getHeaderData( section, orientation, role, headerSet );
}
As I've tested with the debugger, it sefaults exactly when trying to
execute the call return getHeaderData( section, orientation, role,
headerSet ); which does not even happen. In the moment of crashing,
the vars are in this state:
headerSet = 0
section = 0
orientation = Qt::Horizontal
role = 13
Note that in enum Qt::ItemDataRole role = 13 means Qt::SizeHintRole,
so this seems related to sizehint?. The backtrace is:
Application: bookmarks (bookmarks), signal: Segmentation fault
[KCrash Handler]
#6 0xb803dffe in typeinfo name for Akonadi::KonqBookmarkModel () from
/home/edulix/proyectos/kde4/lib/libkonqbookmark.so.4
#7 0xb7b425e5 in Akonadi::EntityTreeModel::headerData
(this=0x951b0b0, section=0, orientation=Qt::Horizontal, role=13)
at /home/edulix/proyectos/kde4/kdesvn/kdepimlibs/akonadi/entitytreemodel.cpp:595
#8 0xb802aa98 in Akonadi::KonqBookmarkModel::headerData
(this=0x951b0b0, section=0, orientation=Qt::Horizontal, role=13)
at /home/edulix/proyectos/kde4/kdesvn/gsoc/konqbookmark/konqbookmarkmodel.cpp:112
#9 0xb78c3edc in QSortFilterProxyModel::headerData (this=0x952b270,
section=0, orientation=Qt::Horizontal, role=13)
at /home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qsortfilterproxymodel.cpp:1623
#10 0xb784c597 in QHeaderView::sectionSizeFromContents
(this=0x93d5c68, logicalIndex=0) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qheaderview.cpp:2519
#11 0xb784d3b6 in QHeaderView::sizeHint (this=0x93d5c68) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qheaderview.cpp:534
#12 0xb787b5ff in QTreeView::updateGeometries (this=0x93d7920) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qtreeview.cpp:2684
#13 0xb7876780 in QTreeView::columnCountChanged (this=0x93d7920,
oldCount=0, newCount=9) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qtreeview.cpp:2523
#14 0xb7885a42 in QTreeView::qt_metacall (this=0x93d7920,
_c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbfc66dd8) at
.moc/release-shared/moc_qtreeview.cpp:143
#15 0xb7fee9f0 in Akonadi::EntityTreeView::qt_metacall
(this=0x93d7920, _c=QMetaObject::InvokeMetaMethod, _id=83,
_a=0xbfc66dd8)
at /home/edulix/proyectos/kde4/kdesvn/build/kdepim/akonadi/akonadi_next/entitytreeview.moc:81
#16 0xb802356a in Akonadi::KonqBookmarkView::qt_metacall
(this=0x93d7920, _c=QMetaObject::InvokeMetaMethod, _id=83,
_a=0xbfc66dd8)
at /home/edulix/proyectos/kde4/kdesvn/build/gsoc/konqbookmark/moc_konqbookmarkview.cpp:67
#17 0xb6ee0c98 in QMetaObject::activate (sender=0x93d5c68,
from_signal_index=75, to_signal_index=75, argv=0xbfc66dd8)
at /home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/corelib/kernel/qobject.cpp:3108
#18 0xb6ee1262 in QMetaObject::activate (sender=0x93d5c68,
m=0xb7a2fbd8, local_signal_index=6, argv=0xbfc66dd8) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/corelib/kernel/qobject.cpp:3185
#19 0xb784abe9 in QHeaderView::sectionCountChanged (this=0x93d5c68,
_t1=0, _t2=9) at .moc/release-shared/moc_qheaderview.cpp:251
.......
Any ideas? Something is really wrong, because I've tried to change the
line return EntityTreeModel::headerData( section, orientation,
role ); with return QVariant(); to see if that was the only problem
but it then gives me a different crash report:
Application: bookmarks (bookmarks), signal: Segmentation fault
[KCrash Handler]
#6 0x080656ca in vtable for __cxxabiv1::__si_class_type_info ()
#7 0xb7b1cb7b in Akonadi::EntityTreeModel::data (this=0x92de5b0,
index=@0xbf93d9e0, role=13) at
/home/edulix/proyectos/kde4/kdesvn/kdepimlibs/akonadi/entitytreemodel.cpp:288
#8 0xb789622c in QSortFilterProxyModel::data (this=0x92e9a10,
index=@0xbf93db88, role=13) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qsortfilterproxymodel.cpp:1589
#9 0xb78631a0 in QItemDelegate::sizeHint (this=0x93233d0,
option=@0xbf93db08, index=@0xbf93db88) at
../../include/QtCore/../../../../qt-copy/src/corelib/kernel/qabstractitemmodel.h:378
#10 0xb7851c6e in QTreeView::indexRowSizeHint (this=0x915a688,
index=@0x94ef900) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qtreeview.cpp:2806
#11 0xb78572ad in QTreeView::rowsInserted (this=0x915a688,
parent=@0xbf93de74, start=0, end=0) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qtreeview.cpp:2436
#12 0xb781bf26 in QAbstractItemView::qt_metacall (this=0x915a688,
_c=QMetaObject::InvokeMetaMethod, _id=17, _a=0xbf93de34) at
.moc/release-shared/moc_qabstractitemview.cpp:227
#13 0xb785c7ba in QTreeView::qt_metacall (this=0x915a688,
_c=QMetaObject::InvokeMetaMethod, _id=48, _a=0xbf93de34) at
.moc/release-shared/moc_qtreeview.cpp:124
#14 0xb7fc59f0 in Akonadi::EntityTreeView::qt_metacall
(this=0x915a688, _c=QMetaObject::InvokeMetaMethod, _id=48,
_a=0xbf93de34)
at /home/edulix/proyectos/kde4/kdesvn/build/kdepim/akonadi/akonadi_next/entitytreeview.moc:81
#15 0xb7ffa4fa in Akonadi::KonqBookmarkView::qt_metacall
(this=0x915a688, _c=QMetaObject::InvokeMetaMethod, _id=48,
_a=0xbf93de34)
at /home/edulix/proyectos/kde4/kdesvn/build/gsoc/konqbookmark/moc_konqbookmarkview.cpp:67
#16 0xb6eb7c98 in QMetaObject::activate (sender=0x92e9a10,
from_signal_index=9, to_signal_index=9, argv=0xbf93de34) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/corelib/kernel/qobject.cpp:3108
#17 0xb6eb8262 in QMetaObject::activate (sender=0x92e9a10,
m=0xb6f504f8, local_signal_index=5, argv=0xbf93de34) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/corelib/kernel/qobject.cpp:3185
#18 0xb6eeec8f in QAbstractItemModel::rowsInserted (this=0x92e9a10,
_t1=@0xbf93de74, _t2=0, _t3=0) at
.moc/release-shared/moc_qabstractitemmodel.cpp:159
#19 0xb6ea01c3 in QAbstractItemModel::endInsertRows (this=0x92e9a10)
at /home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/corelib/kernel/qabstractitemmodel.cpp:2081
#20 0xb78985bb in QSortFilterProxyModelPrivate::insert_source_items
(this=0x92e89c0, source_to_proxy=@0x92e59f8,
proxy_to_source=@0x92e59f0, source_items=@0xbf93dfa4,
source_parent=@0xbf93e114,
orient=Qt::Vertical, emit_signal=true) at
/home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qsortfilterproxymodel.cpp:617
#21 0xb789c922 in QSortFilterProxyModelPrivate::source_items_inserted
(this=0x92e89c0, source_parent=@0xbf93e114, start=1, end=0,
orient=Qt::Vertical)
at /home2/edulix/proyectos/kde4/kdesvn/qt-copy/src/gui/itemviews/qsortfilterproxymodel.cpp:713
Which also seems to be related to sizes - I start seeing a pattern but
I don't now yet how to fix it. Maybe it's not really related to sizes
but when calling to sizeHint is where the problem arises, I don't
know. Any ideas?
Regards,
Eduardo Robles Elvira.
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