If you have a tracker report widget linked to a tracker report that is not accessible (deleted report, non active tracker or project), accessing the dashboard containing the widget generates a crash.

Issue has been introduced by git #tuleap/stable/7bed32a7137a55a6a858eafab374bc28e9b7a273.

Trace:
Fatal error: Uncaught Error: Call to a member function getJavascriptDependencies() on null in /usr/share/tuleap/plugins/tracker/include/Tracker/Widget/Tracker_Widget_Renderer.class.php on line 228
Error: Call to a member function getJavascriptDependencies() on null in /usr/share/tuleap/plugins/tracker/include/Tracker/Widget/Tracker_Widget_Renderer.class.php on line 228
Call Stack
# Time Memory Function Location
1 0.0000 399368 {main}( ) .../index.php:0
2 0.0119 2388912 Tuleap\Request\FrontRouter->route( ) .../index.php:46
3 0.0122 2397128 Tuleap\Request\FrontRouter->routeHandler( ) .../FrontRouter.php:89
4 0.0270 3461104 Tuleap\Project\Home->process( ) .../FrontRouter.php:222
5 0.0472 4193192 Tuleap\Dashboard\Project\ProjectDashboardRouter->route( ) .../Home.php:131
6 0.0472 4193192 Tuleap\Dashboard\Project\ProjectDashboardController->display( ) .../ProjectDashboardRouter.php:83
7 0.0485 4199344 Tuleap\Dashboard\Project\ProjectDashboardController->getProjectDashboardsPresenter( ) .../ProjectDashboardController.php:127
8 0.0730 4724848 Tuleap\Dashboard\Widget\DashboardWidgetPresenterBuilder->getWidgetsPresenter( ) .../ProjectDashboardController.php:364
9 0.0730 4724848 Tuleap\Dashboard\Widget\DashboardWidgetPresenterBuilder->getColumnsPresenterByLine( ) .../DashboardWidgetPresenterBuilder.php:54
10 0.0730 4724848 Tuleap\Dashboard\Widget\DashboardWidgetPresenterBuilder->getWidgetsPresenterByColumn( ) .../DashboardWidgetPresenterBuilder.php:76
11 0.0839 5125912 Tuleap\Dashboard\Widget\DashboardWidgetPresenter->__construct( ) .../DashboardWidgetPresenterBuilder.php:102
12 0.0839 5125912 Tracker_Widget_ProjectRenderer->getJavascriptDependencies( ) .../DashboardWidgetPresenter.php:75