cache-tree: reject entries with null sha1

diff --git a/t/t1501-work-tree.sh b/t/t1501-work-tree.sh
index cc5b870e5875bab8326393aea3a8d9f944210de6..b06210ec5e8ffa30b59314b1c79ebc9bdb8f6476 100755 (executable)
--- a/t/t1501-work-tree.sh
+++ b/t/t1501-work-tree.sh
@@ -423,4 +423,12 @@ test_expect_success '$GIT_WORK_TREE overrides $GIT_DIR/common' '
        )
 '
 
+test_expect_success 'error out gracefully on invalid $GIT_WORK_TREE' '
+       (
+               GIT_WORK_TREE=/.invalid/work/tree &&
+               export GIT_WORK_TREE &&
+               test_expect_code 128 git rev-parse
+       )
+'
+
 test_done