Antivirus detection with drag and drop on file manager form element is not verbose enough.

When anti virus checking is enabled on uploaded files; on the course page with drag and drop and in file picker; if the user uploads an infected file, the file is not uploaded. Moodle also displays a dialog with a message informing the user of what has happened. When the user drags a file onto the file manager form element, although the file is not uploaded, there is no dialog to inform the user what has just happened.

To recreate:

1. Drag an infected file - get a test file from http://www.eicar.org/85-0-Download.html - onto any File manager form element.

Expected result:

• Clam AV blocks the file and Moodle informs the user that the file has been blocked.

Actual result:

• Clam AV blocks the file it is not uploaded but there is no other feedback from Moodle.