submodule: don't rely on overlayed config when setting diffopts

diff --git a/t/t9807-git-p4-submit.sh b/t/t9807-git-p4-submit.sh
index e37239e657964e948e51e5ac186f5fdf4fab6003..3457d5db64afc09f63e8c7de4c51b932b012c7ee 100755 (executable)
--- a/t/t9807-git-p4-submit.sh
+++ b/t/t9807-git-p4-submit.sh
@@ -139,6 +139,22 @@ test_expect_success 'submit with master branch name from argv' '
        )
 '
 
+test_expect_success 'allow submit from branch with same revision but different name' '
+       test_when_finished cleanup_git &&
+       git p4 clone --dest="$git" //depot &&
+       (
+               cd "$git" &&
+               test_commit "file8" &&
+               git checkout -b branch1 &&
+               git checkout -b branch2 &&
+               git config git-p4.skipSubmitEdit true &&
+               git config git-p4.allowSubmit "branch1" &&
+               test_must_fail git p4 submit &&
+               git checkout branch1 &&
+               git p4 submit
+       )
+'
+
 #
 # Basic submit tests, the five handled cases
 #