read-tree A B C: do not create a bogus index and do not segfault

diff --git a/t/t6120-describe.sh b/t/t6120-describe.sh
index c6be2597f73dbd49e6301d01b5ea3c86ac8c34cb..2fb672c3b43a9efe4cb9c85465f6b33f23724e48 100755 (executable)
--- a/t/t6120-describe.sh
+++ b/t/t6120-describe.sh
@@ -139,4 +139,6 @@ check_describe "test1-lightweight-*" --tags --match="test1-*"
 
 check_describe "test2-lightweight-*" --tags --match="test2-*"
 
+check_describe "test2-lightweight-*" --long --tags --match="test2-*" HEAD^
+
 test_done