QGIS crahses when exporting a template

[qgib]

Author Name: Christophe Poupon (Christophe Poupon)
Original Redmine Issue: 21983
Affected QGIS version: 3.6.2
Redmine category:map_composer/printing

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QGIS crash when i export a layout create from a template.
First i create a new layout in layout manager from my template.
Then, without changing anything,i export the layout to pdf or pgn -> crashed

As alternative, i select and copy all item that i paste in a new blank layout.

Crash ID: 3ed09f0b9da4a6fd9d2c76522e1b24cdcc418bd5

Stack Trace

QGraphicsItem::pos :
QgsLayoutMultiFrame::handlePageChange :
QMetaObject::activate :
QgsLayoutPageCollection::reflow :
QgsLayout::refresh :
QgsVertexEditorModel::flags :
QMetaObject::activate :
QAction::activate :
QAbstractButton::click :
QAbstractButton::mouseReleaseEvent :
QToolButton::mouseReleaseEvent :
QWidget::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QApplicationPrivate::sendMouseEvent :
QSizePolicy::QSizePolicy :
QSizePolicy::QSizePolicy :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QGuiApplicationPrivate::processMouseEvent :
QWindowSystemInterface::sendWindowSystemEvents :
QEventDispatcherWin32::processEvents :
TranslateMessageEx :
TranslateMessage :
QEventDispatcherWin32::processEvents :
qt_plugin_query_metadata :
QEventLoop::exec :
QCoreApplication::exec :
main :
BaseThreadInitThunk :
RtlUserThreadStart :

QGIS Info
QGIS Version: 3.6.2-Noosa
QGIS code revision: 656500e
Compiled against Qt: 5.11.2
Running against Qt: 5.11.2
Compiled against GDAL: 2.4.1
Running against GDAL: 2.4.1

System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 6.1.7601

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• QGIS model_A3_paysage_cartouche quart vertical droite.qpt (Christophe Poupon)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Confirmed here too on Linux, is not even needed the specific project data, just import the provided layout in a whatever project.

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• operating_system was changed from Win 7 Pro SP1, HP Z220 CMT Workstation 64 bits to
• priority_id was changed from Normal to High
• subject was changed from QGIS Crash when i export a template to QGIS crahses when exporting a template