[PATCH 2/2] rebase --root: fix amending root commit messages

[Johannes Schindelin via GitGitGadget <gitgitgadget@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

The code path that triggered that "BUG" really does not want to run
without an explicit commit message. In the case where we want to amend a
commit message, we have an *implicit* commit message, though: the one of
the commit to amend. Therefore, this code path should not even be
entered.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 sequencer.c                   | 2 +-
 t/t3404-rebase-interactive.sh | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sequencer.c b/sequencer.c
index cca968043..4034c0461 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -784,7 +784,7 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts,
 	struct child_process cmd = CHILD_PROCESS_INIT;
 	const char *value;
 
-	if (flags & CREATE_ROOT_COMMIT) {
+	if ((flags & CREATE_ROOT_COMMIT) && !(flags & AMEND_MSG)) {
 		struct strbuf msg = STRBUF_INIT, script = STRBUF_INIT;
 		const char *author = is_rebase_i(opts) ?
 			read_author_ident(&script) : NULL;
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index ca94c688d..e500d7c32 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -971,7 +971,7 @@ test_expect_success 'rebase -i --root fixup root commit' '
 	test 0 = $(git cat-file commit HEAD | grep -c ^parent\ )
 '
 
-test_expect_failure 'rebase -i --root reword root commit' '
+test_expect_success 'rebase -i --root reword root commit' '
 	test_when_finished "test_might_fail git rebase --abort" &&
 	git checkout -b reword-root-branch master &&
 	set_fake_editor &&
-- 
2.17.0.windows.1