use xcalloc() to allocate zero-initialized memory

diff --git a/t/t2107-update-index-basic.sh b/t/t2107-update-index-basic.sh
index fe2fb17102cdc17168ae2d683d7d51a0b3e3f3bc..1bafb9098c7fae33969e9231fbdee1c0370830a1 100755 (executable)
--- a/t/t2107-update-index-basic.sh
+++ b/t/t2107-update-index-basic.sh
@@ -29,6 +29,10 @@ test_expect_success 'update-index -h with corrupt index' '
        test_i18ngrep "[Uu]sage: git update-index" broken/usage
 '
 
+test_expect_success '--cacheinfo complains of missing arguments' '
+       test_must_fail git update-index --cacheinfo
+'
+
 test_expect_success '--cacheinfo does not accept blob null sha1' '
        echo content >file &&
        git add file &&