commit 52f52e5ae4937de2bc798828c47c49f469b2cc85
Author: REDACTED <REDACTED@REDACTED>
Date:   Mon Nov 11 13:03:41 2019 +0700

    sequencer: reencode commit message for am/rebase --show-current-patch
    
    The message file will be used as commit message for the
    git-{am,rebase} --continue.
    
    Signed-off-by: REDACTED <REDACTED@REDACTED>
    Signed-off-by: REDACTED <REDACTED@REDACTED>

diff --git a/sequencer.c b/sequencer.c
index d735d09f98..4d12ad3cc6 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2972,7 +2972,8 @@ static int make_patch(struct repository *r,
 
 	strbuf_addf(&buf, "%s/message", get_dir(opts));
 	if (!file_exists(buf.buf)) {
-		const char *commit_buffer = get_commit_buffer(commit, NULL);
+		const char *encoding = get_commit_output_encoding();
+		const char *commit_buffer = logmsg_reencode(commit, NULL, encoding);
 		find_commit_subject(commit_buffer, &subject);
 		res |= write_message(subject, strlen(subject), buf.buf, 1);
 		unuse_commit_buffer(commit, commit_buffer);
diff --git a/t/t3434-rebase-i18n.sh b/t/t3434-rebase-i18n.sh
index c6c16373eb..4b5b128cd6 100755
--- a/t/t3434-rebase-i18n.sh
+++ b/t/t3434-rebase-i18n.sh
@@ -54,4 +54,31 @@ test_expect_failure 'rebase --rebase-merges update encoding eucJP to ISO-2022-JP
 	compare_msg eucJP.txt eucJP ISO-2022-JP
 '
 
+test_rebase_continue_update_encode () {
+	old=$1
+	new=$2
+	msgfile=$3
+	test_expect_success "rebase --continue update from $old to $new" '
+		(git rebase --abort || : abort current git-rebase failure) &&
+		git switch -c conflict-$old-$new one &&
+		echo for-conflict >two.t &&
+		git add two.t &&
+		git config i18n.commitencoding $old &&
+		git commit -F "$TEST_DIRECTORY/t3434/$msgfile" &&
+		git config i18n.commitencoding $new &&
+		test_must_fail git rebase -m master &&
+		test -f .git/rebase-merge/message &&
+		git stripspace <.git/rebase-merge/message >two.t &&
+		git add two.t &&
+		git rebase --continue &&
+		compare_msg $msgfile $old $new &&
+		: git-commit assume invalid utf-8 is latin1 &&
+		test_cmp expect two.t
+	'
+}
+
+test_rebase_continue_update_encode ISO-8859-1 UTF-8 ISO8859-1.txt
+test_rebase_continue_update_encode eucJP UTF-8 eucJP.txt
+test_rebase_continue_update_encode eucJP ISO-2022-JP eucJP.txt
+
 test_done
diff --git a/t/t3434/ISO8859-1.txt b/t/t3434/ISO8859-1.txt
new file mode 100644
index 0000000000..7cbef0ee6f
--- /dev/null
+++ b/t/t3434/ISO8859-1.txt
@@ -0,0 +1,3 @@
+ÄËÑÏÖ
+
+Ábçdèfg