untracked-cache: be defensive about missing NULs in index

diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
index e28953975b46484327c8c9e0e32993b83a164a6a..9f8f0e84ad4f35b72da73ef8ddfee0a3cddfbe1a 100755 (executable)
--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -358,6 +358,7 @@ diff --line-prefix=abc master master^ side
 diff --dirstat master~1 master~2
 diff --dirstat initial rearrange
 diff --dirstat-by-file initial rearrange
+diff --dirstat --cc master~1 master
 # No-index --abbrev and --no-abbrev
 diff --raw initial
 :noellipses diff --raw initial