Re: git merge -s subtree seems to be broken.

["René Scharfe" <l.s.r@web.de>]

Am 31.07.2018 um 23:06 schrieb Junio C Hamano:
> Jeff King <peff@peff.net> writes:
> 
>> On Tue, Jul 31, 2018 at 01:23:04PM -0400, Jeff King wrote:
>> ...
>> So here it is fixed, and with a commit message. I'm not happy to omit a
>> regression test, but I actually couldn't come up with a minimal one that
>> tickled the problem, because we're playing around with heuristics.
How about something like this? (squashable)

---
 t/t6029-merge-subtree.sh | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/t/t6029-merge-subtree.sh b/t/t6029-merge-subtree.sh
index 3e692454a7..474a850de6 100755
--- a/t/t6029-merge-subtree.sh
+++ b/t/t6029-merge-subtree.sh
@@ -29,6 +29,34 @@ test_expect_success 'subtree available and works like recursive' '
 
 '
 
+test_expect_success 'setup branch sub' '
+	git checkout --orphan sub &&
+	git rm -rf . &&
+	test_commit foo
+'
+
+test_expect_success 'setup branch main' '
+	git checkout -b main master &&
+	git merge -s ours --no-commit --allow-unrelated-histories sub &&
+	git read-tree --prefix=dir/ -u sub &&
+	git commit -m "initial merge of sub into main" &&
+	test_path_is_file dir/foo.t &&
+	test_path_is_file hello
+'
+
+test_expect_success 'update branch sub' '
+	git checkout sub &&
+	test_commit bar
+'
+
+test_expect_success 'update branch main' '
+	git checkout main &&
+	git merge -s subtree sub -m "second merge of sub into main" &&
+	test_path_is_file dir/bar.t &&
+	test_path_is_file dir/foo.t &&
+	test_path_is_file hello
+'
+
 test_expect_success 'setup' '
 	mkdir git-gui &&
 	cd git-gui &&
-- 
2.18.0