diff --git a/builtin-diff-index.c b/builtin-diff-index.c
index 95a3db156bda2d1e8d2ad7bdf72a9f9a821c6f51..083599d5c4c174cfab7c148428630534e4cd8174 100644 (file)
--- a/builtin-diff-index.c
+++ b/builtin-diff-index.c
if (rev.pending.nr != 1 ||
rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
usage(diff_cache_usage);
+ if (read_cache() < 0) {
+ perror("read_cache");
+ return -1;
+ }
return run_diff_index(&rev, cached);
}