t5704 (bundle): add tests for bundle --stdin

As long as no rev-list arguments are supplied on the command line,
git bundle create --stdin currently segfaults.  With added rev-list
arguments, it does not segfault, but the revisions from stdin are
ignored.

Thanks to Joey Hess <joey@kitenet.net> for the report.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t5704-bundle.sh

@@ -30,4 +30,20 @@ test_expect_success 'tags can be excluded by rev-list options' '
 
 '
 
+test_expect_failure 'bundle --stdin' '
+
+	echo master | git bundle create stdin-bundle.bdl --stdin &&
+	git ls-remote stdin-bundle.bdl >output &&
+	grep master output
+
+'
+
+test_expect_failure 'bundle --stdin <rev-list options>' '
+
+	echo master | git bundle create hybrid-bundle.bdl --stdin tag &&
+	git ls-remote hybrid-bundle.bdl >output &&
+	grep master output
+
+'
+
 test_done