worktree: check the result of read_in_full()

diff --git a/sequencer.c b/sequencer.c
index fcceabb80f4261006cdd65bc0ec95ac54ea42e7c..60636ce54b615e19a22dc2396211d56540b4e920 100644 (file)
--- a/sequencer.c
+++ b/sequencer.c
@@ -1565,6 +1565,7 @@ static int save_head(const char *head)
        static struct lock_file head_lock;
        struct strbuf buf = STRBUF_INIT;
        int fd;
+       ssize_t written;
 
        fd = hold_lock_file_for_update(&head_lock, git_path_head_file(), 0);
        if (fd < 0) {
@@ -1572,7 +1573,9 @@ static int save_head(const char *head)
                return error_errno(_("could not lock HEAD"));
        }
        strbuf_addf(&buf, "%s\n", head);
-       if (write_in_full(fd, buf.buf, buf.len) < 0) {
+       written = write_in_full(fd, buf.buf, buf.len);
+       strbuf_release(&buf);
+       if (written < 0) {
                rollback_lock_file(&head_lock);
                return error_errno(_("could not write to '%s'"),
                                   git_path_head_file());