1 files changed, 23 insertions, 0 deletions
diff --git a/t/t1601-index-bogus.sh b/t/t1601-index-bogus.sh
new file mode 100755
index 0000000000..a45a8b4eb0
--- /dev/null
+++ b/t/t1601-index-bogus.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+test_description='test handling of bogus index entries'
+
+. ./test-lib.sh
+
+test_expect_success 'create tree with null sha1' '
+	tree=$(printf "160000 commit $ZERO_OID\\tbroken\\n" | git mktree)
+'
+
+test_expect_success 'read-tree refuses to read null sha1' '
+	test_must_fail git read-tree $tree
+'
+
+test_expect_success 'GIT_ALLOW_NULL_SHA1 overrides refusal' '
+	GIT_ALLOW_NULL_SHA1=1 git read-tree $tree
+'
+
+test_expect_success 'git write-tree refuses to write null sha1' '
+	test_must_fail git write-tree
+'
+
+test_done