Hi, I'm trying to use git-format-patch --base to generate the list of prerequisite patches for a series, but the behavior of git doesn't seem to match the documentation: When using a commit count (e.g.: "-2"), git-format-patch generates the prerequisite-patch-id lines as expected. But when using a commit range like "Z..C", the prerequisite-patch-id lines are missing. Is this intentional, or it is a bug? Example using git.git commits: $ git format-patch --stdout --cover-letter --stdout --base b7b1fca17~5 -2 b7b1fca17 | egrep 'base-commit|prereq' base-commit: 2738744426c161a98c2ec494d41241a4c5eef9ef prerequisite-patch-id: 080ac2faf21a6a7f9b23cb68286866d026a92930 prerequisite-patch-id: e3ee77500c9aa70248e7ee814662d01f79d0dcdb prerequisite-patch-id: 6d831e23e33075681e6b74553151a32b73092013 (ehabkost@localhost:~/rh/proj/git (ok) 1j) $ git format-patch --stdout --cover-letter --stdout --base b7b1fca17~5 b7b1fca17~2..b7b1fca17 | egrep 'base-commit|prereq' base-commit: 2738744426c161a98c2ec494d41241a4c5eef9ef $ git --version git version 2.17.1 $ git log --graph --pretty=oneline -6 b7b1fca17 * b7b1fca175f1ed7933f361028c631b9ac86d868d fsck: complain when .gitmodules is a symlink * 73c3f0f704a91b6792e0199a3f3ab6e3a1971675 index-pack: check .gitmodules files with --strict * 6e328d6caef218db320978e3e251009135d87d0e unpack-objects: call fsck_finish() after fscking objects * 1995b5e03e1cc97116be58cdc0502d4a23547856 fsck: call fsck_finish() after fscking objects * ed8b10f631c9a71df3351d46187bf7f3fa4f9b7e fsck: check .gitmodules content * 2738744426c161a98c2ec494d41241a4c5eef9ef fsck: handle promisor objects in .gitmodules check $ If I understand the documentation correctly, both "-3 C" or "Z..C" were supposed to be equivalent: > With `git format-patch --base=P -3 C` (or variants thereof, e.g. with > `--cover-letter` or using `Z..C` instead of `-3 C` to specify the > range), the base tree information block is shown at the end of the > first message the command outputs (either the first patch, or the > cover letter), like this: > > ------------ > base-commit: P > prerequisite-patch-id: X > prerequisite-patch-id: Y > prerequisite-patch-id: Z > ------------ -- Eduardo