Steps to reproduce the issue

On Php 8.0 try to create the Image object with the class Joomla\Image like that :

$file = "C:\Users\xillibit\git\joomla-cms-39/media/kunena/avatars/users/myimage.jpg" $image = new Image($file);

The issue coming from this call in Image class line 679 :

$handle = imagecreatefromjpeg($path);

On php 8.0 it doesn't returns a ressource but an object :

object(GdImage)#876 (0) { }

Expected result

No exception like on Php 7.4.13

Actual result

Exception : Unable to process JPG image. in C:\Users\xillibit\git\joomla-cms-39\libraries\vendor\joomla\image\src\Image.php on line 143

System information (as much as possible)

Windows 10 20H2
Php 8.0.0 with gd, fileinfo and exif enabled
Joomla! 3.9.24-dev (sync from git)

Additional comments