Re: [BUG] git diff-tree --stdin doesn't accept two trees

Karl Hasselström [off-list ref] writes:

quoted

The feature of --stdin to take a commit and its parents on one line was
broken before that to support the common

        rev-list --parents $commits... -- $paths... |
                diff-tree --stdin -v -p

usage pattern by Porcelains.  For diff-tree to talk sensibly about
commits, it needs to see commits, not just trees.

But is there any fundamental reason why it couldn't accept tree-ishes
as well?

The -v option given to diff-tree is the key.  Without it, it could take
trees.