Error when previewing post using alt field

same issue with the last version (7.x-1.0-alpha1) when previewing the node:

Notice : Undefined index: alt dans theme_image_formatter() (ligne 581 dans /.../modules/image/image.field.inc).
Notice : Undefined index: title dans theme_image_formatter() (ligne 590 dans /.../modules/image/image.field.inc).

There is no error when the Plup module is not used to upload the images.

re-opening the issue, since it is not solved and seems directly related to this module.

To reproduce the error, I think you need to "untick" the "Enable the Alt field" and "Enable the Title field" lines in the image field settings of the node.
=> when these are ticked, I have no error.

So I guess that the Plup module cannot treat the case where these values are missing?

This also happens without plup. Previews are build out of form data. If the alt and title form fields aren't available you get these notices.

#6: 1424602-D7.patch queued for re-testing.

Ok thank you.
So it means that I have to apply the above patches to the image core module ?

This is a duplicate of #1587870: Undefined index: alt in theme_image_formatter() and Undefined index: title in theme_image_formatter() which is being fixed in #1038932: theme_image_formatter() assumes that title, alt, and options are always set.