[PATCH v3 8/8] t7814: show lack of alternate ODB-adding

The previous patches have made "git grep" no longer need to add
submodule ODBs as alternates, at least for the code paths tested in
t7814. Demonstrate this by making adding a submodule ODB as an alternate
fatal in this test.

Signed-off-by: Jonathan Tan <redacted>
---
 t/t7814-grep-recurse-submodules.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/t/t7814-grep-recurse-submodules.sh b/t/t7814-grep-recurse-submodules.sh
index 828cb3ba58..3172f5b936 100755
--- a/t/t7814-grep-recurse-submodules.sh
+++ b/t/t7814-grep-recurse-submodules.sh

@@ -8,6 +8,9 @@ submodules.
 
 . ./test-lib.sh
 
+GIT_TEST_FATAL_REGISTER_SUBMODULE_ODB=1
+export GIT_TEST_FATAL_REGISTER_SUBMODULE_ODB
+
 test_expect_success 'setup directory structure and submodule' '
 	echo "(1|2)d(3|4)" >a &&
 	mkdir b &&

-- 
2.33.0.rc1.237.g0d66db33f3-goog