Crashes in net_field_length since commit 295f3e4cfb4a8f132f36d53475efc92f2487aa97

(gdb) bt

#0  net_field_length (packet=packet@entry=0x7fffffffd1c8) at /usr/src/debug/server/libmariadb/libmariadb/mariadb_lib.c:296

#1  0x00007fff6749d6dc in ps_fetch_string (r_param=0x55555b44b988, field=<optimized out>, row=0x7fffffffd1c8)

    at /usr/src/debug/server/libmariadb/libmariadb/ma_stmt_codec.c:1195

#2  0x00007fff67497ca7 in mthd_stmt_fetch_to_bind (stmt=0x55555b3d0a90, row=<optimized out>)

    at /usr/src/debug/server/libmariadb/libmariadb/mariadb_stmt.c:423

#3  0x00007fff674997b7 in mysql_stmt_fetch (stmt=0x55555b3d0a90) at /usr/src/debug/server/libmariadb/libmariadb/mariadb_stmt.c:1463

#4  0x00007fff840192ed in  () at /usr/lib/qt/plugins/sqldrivers/libqsqlmysql.so

#5  0x00007ffff70c1819 in Digikam::BdEngineBackend::readToList(Digikam::DbEngineSqlQuery&) () at /usr/lib/libdigikamcore.so.7.3.0

#6  0x00007ffff70c1942 in Digikam::BdEngineBackend::handleQueryResult(Digikam::DbEngineSqlQuery&, QList<QVariant>*, QVariant*) ()

    at /usr/lib/libdigikamcore.so.7.3.0

#7  0x00007ffff70c305b in Digikam::BdEngineBackend::execSql(QString const&, QVariant const&, QList<QVariant>*, QVariant*) ()

    at /usr/lib/libdigikamcore.so.7.3.0

#8  0x00007ffff756f835 in Digikam::CoreDB::getItemPosition(long long, QFlags<Digikam::DatabaseFields::ItemPositionsField>) const ()

    at /usr/lib/libdigikamdatabase.so.7.3.0

#9  0x00007ffff75e7312 in  () at /usr/lib/libdigikamdatabase.so.7.3.0

#10 0x00007ffff75e7a3c in Digikam::ItemPosition::ItemPosition(long long) () at /usr/lib/libdigikamdatabase.so.7.3.0

#11 0x00007ffff75d011c in Digikam::ItemInfo::imagePosition() const () at /usr/lib/libdigikamdatabase.so.7.3.0

#12 0x00007ffff75d0432 in Digikam::ItemInfo::hasCoordinates() const () at /usr/lib/libdigikamdatabase.so.7.3.0

#13 0x00007ffff7d48e2c in  () at /usr/lib/libdigikamgui.so.7.3.0

#14 0x00007ffff55774ff in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5

#15 0x00007ffff601ed62 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5

#16 0x00007ffff554a3aa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5

#17 0x00007ffff554d4a9 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5

#18 0x00007ffff55a39a4 in  () at /usr/lib/libQt5Core.so.5

#19 0x00007fffe449210c in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0

--Type <RET> for more, q to quit, c to continue without paging--

#20 0x00007fffe44e5b99 in  () at /usr/lib/libglib-2.0.so.0

#21 0x00007fffe448f871 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0

#22 0x00007ffff55a2fd6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5

#23 0x00007ffff5548d1c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5

#24 0x00007ffff7a3afea in Digikam::ScanController::completeCollectionScanCore(bool, bool) () at /usr/lib/libdigikamgui.so.7.3.0

#25 0x00007ffff7bcc4e9 in Digikam::NewItemsFinder::slotStart() () at /usr/lib/libdigikamgui.so.7.3.0

#26 0x00007ffff55774ff in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5

#27 0x00007ffff601ed62 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5

#28 0x00007ffff554a3aa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5

#29 0x00007ffff554d4a9 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5

#30 0x00007ffff55a39a4 in  () at /usr/lib/libQt5Core.so.5

#31 0x00007fffe449210c in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0

#32 0x00007fffe44e5b99 in  () at /usr/lib/libglib-2.0.so.0

#33 0x00007fffe448f871 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0

#34 0x00007ffff55a2fd6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5

#35 0x00007ffff5548d1c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5

#36 0x00007ffff623325e in QDialog::exec() () at /usr/lib/libQt5Widgets.so.5

#37 0x00007ffff70498e3 in Digikam::FilesDownloader::startDownload() () at /usr/lib/libdigikamcore.so.7.3.0

#38 0x000055555555a71b in  ()

#39 0x00007ffff4eb9b25 in __libc_start_main () at /usr/lib/libc.so.6

#40 0x000055555555bece in _start ()