index-pack: work around thread-unsafe pread()

diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh
index 0825a928dfa2a340f6fce6e2313324bd5d63ea7f..0246e80b1af98fe213b06beb8de0a9fec464b9f2 100755 (executable)
--- a/t/t7406-submodule-update.sh
+++ b/t/t7406-submodule-update.sh
@@ -762,6 +762,17 @@ test_expect_success 'submodule update clone shallow submodule' '
         (cd submodule &&
          test 1 = $(git log --oneline | wc -l)
         )
+)
+'
+
+test_expect_success 'submodule update --recursive drops module name before recursing' '
+       (cd super2 &&
+        (cd deeper/submodule/subsubmodule &&
+         git checkout HEAD^
+        ) &&
+        git submodule update --recursive deeper/submodule >actual &&
+        test_i18ngrep "Submodule path .deeper/submodule/subsubmodule.: checked out" actual
        )
 '
+
 test_done