Sometimes (bad arguments maybe) a view can return empty result which is NULL actually in this line:
$entities = $this->view->execute_display($display_name, $args);
I suggest to fix the result in this case.

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entityreference-fix_view_result.patch725 bytesmaximpodorov

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Issue summary: View changes
Status: Needs review » Closed (duplicate)

Duplicate of #1753774: Multiple warnings when using entity reference field filtered by a view using contextual filters, inside a field collection.