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-rw-r--r--builtin-diff-files.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/builtin-diff-files.c b/builtin-diff-files.c
index 5d4a5c582..3ee26059f 100644
--- a/builtin-diff-files.c
+++ b/builtin-diff-files.c
@@ -47,5 +47,9 @@ int cmd_diff_files(int argc, const char **argv, const char *prefix)
if (rev.pending.nr ||
rev.min_age != -1 || rev.max_age != -1)
usage(diff_files_usage);
+ if (read_cache() < 0) {
+ perror("read_cache");
+ return -1;
+ }
return run_diff_files(&rev, silent);
}