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