adapting a dpatch to changed source: how?

[Andreas Schildbach <andreas@schildbach.de>]

Hi,

I wonder what's the best workflow to adapt a patch to a changed source.

In a sid package using dpatch, I have updated the source to the latest
upstream tarball. Unfortunately, one of my patches does not apply any
more.

I expected dpatch-edit-patch to offer some workflow for this, but could
not find any. Editing the patch file by hand is not an option. Even
finding out the cause of the failure by examining the .rej file has been
no success.

Is there any documentation for this case (which can't be that uncommon)?

Best regards,

Andreas