[4.0]Feed Display module uncaught error in rss.xml feed

[toivo]

Steps to reproduce the issue

Create a News Feed category and item for http://feeds.bbci.co.uk/news/world/europe/rss.xml
Use this feed item in a Feed Display module.

Expected result

Should work the same way it works when set up as the menu item type News Feed - Single News Feed.

Actual result

Uncaught Throwable of type Error thrown with message "Object of class Joomla\CMS\Feed\FeedLink could not be converted to string" in C:\www\joomla4\modules\mod_feed\tmpl\default.php (line 99)

System information (as much as possible)

Nightly Build of 27 May on Wampserver 3.2.1 MySQL 8.0.19 PHP 7.4.5

Additional comments

[toivo]

2020-05-27T02:56:02+00:00 CRITICAL 127.0.0.1 error Uncaught Throwable of type Error thrown with message "Object of class Joomla\CMS\Feed\FeedLink could not be converted to string". Stack trace: #0 C:\www\joomla4\modules\mod_feed\mod_feed.php(20): require()
#1 C:\www\joomla4\libraries\src\Dispatcher\ModuleDispatcher.php(54): include('C:\www\joomla4\...')
#2 C:\www\joomla4\libraries\src\Dispatcher\ModuleDispatcher.php(57): Joomla\CMS\Dispatcher\ModuleDispatcher::Joomla\CMS\Dispatcher{closure}('C:\www\joomla4/...', NULL)
#3 C:\www\joomla4\libraries\src\Helper\ModuleHelper.php(300): Joomla\CMS\Dispatcher\ModuleDispatcher->dispatch()
#4 C:\www\joomla4\libraries\src\Helper\ModuleHelper.php(173): Joomla\CMS\Helper\ModuleHelper::renderRawModule(Object(stdClass), Object(Joomla\Registry\Registry), Array)
#5 C:\www\joomla4\libraries\src\Document\Renderer\Html\ModuleRenderer.php(97): Joomla\CMS\Helper\ModuleHelper::renderModule(Object(stdClass), Array)
#6 C:\www\joomla4\libraries\src\Document\Renderer\Html\ModulesRenderer.php(48): Joomla\CMS\Document\Renderer\Html\ModuleRenderer->render(Object(stdClass), Array, NULL)
#7 C:\www\joomla4\libraries\src\Document\HtmlDocument.php(590): Joomla\CMS\Document\Renderer\Html\ModulesRenderer->render('sidebar-left', Array, NULL)
#8 C:\www\joomla4\libraries\src\Document\HtmlDocument.php(899): Joomla\CMS\Document\HtmlDocument->getBuffer('modules', 'sidebar-left', Array)
#9 C:\www\joomla4\libraries\src\Document\HtmlDocument.php(661): Joomla\CMS\Document\HtmlDocument->_renderTemplate()
#10 C:\www\joomla4\libraries\src\Application\CMSApplication.php(972): Joomla\CMS\Document\HtmlDocument->render(false, Array)
#11 C:\www\joomla4\libraries\src\Application\SiteApplication.php(752): Joomla\CMS\Application\CMSApplication->render()
#12 C:\www\joomla4\libraries\src\Application\CMSApplication.php(237): Joomla\CMS\Application\SiteApplication->render()
#13 C:\www\joomla4\includes\app.php(63): Joomla\CMS\Application\CMSApplication->execute()
#14 C:\www\joomla4\index.php(36): require_once('C:\www\joomla4\...')
#15 {main}

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/29236.}

[SharkyKZ]

Once #29237 reaches 4.0, it will solve this issue.

[ghost]

If Feed Image in Feed Display-Module is

Yes (default)	No
White screen showing above lines	works as expected

[SharkyKZ]

Closing this as #29237 has been merged into 4.0-dev via 9c5ad82.