git checkout master
t-expect-fail F:'Could not determine appropriate upstream commitish' \
-t-git-debrebase new-upstream-v0 $v
+t-git-debrebase new-upstream $v
git tag v2.1 upstream
-t-git-debrebase new-upstream-v0 $v
+t-git-debrebase new-upstream $v
t-gdr-good laundered
t-git-debrebase stitch
exit;
')
-t-git-debrebase --anchor=$anchor -fanchor-treated new-upstream-v0 $v upstream
+t-git-debrebase --anchor=$anchor -fanchor-treated new-upstream $v upstream
t-gdr-good laundered
t-git-debrebase stitch