sequencer: ensure to release the lock when we could not read the index

A future caller of read_and_refresh_cache() may want to do more than just
print some helpful advice in case of failure.

Suggested by Junio Hamano.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sequencer.c b/sequencer.c
index d92a632f29c89f2e536b6f140fede597c6f086da..eec8a60d6bdf22d429c14ad07288f823d9bac7b5 100644 (file)
--- a/sequencer.c
+++ b/sequencer.c
@@ -644,14 +644,18 @@ static int read_and_refresh_cache(struct replay_opts *opts)
 {
        static struct lock_file index_lock;
        int index_fd = hold_locked_index(&index_lock, 0);
-       if (read_index_preload(&the_index, NULL) < 0)
+       if (read_index_preload(&the_index, NULL) < 0) {
+               rollback_lock_file(&index_lock);
                return error(_("git %s: failed to read the index"),
                        action_name(opts));
+       }
        refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL);
        if (the_index.cache_changed && index_fd >= 0) {
-               if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK))
+               if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) {
+                       rollback_lock_file(&index_lock);
                        return error(_("git %s: failed to refresh the index"),
                                action_name(opts));
+               }
        }
        rollback_lock_file(&index_lock);
        return 0;