format-patch: notice failure to open cover letter for writing

diff --git a/builtin/log.c b/builtin/log.c
index 2e4218cb57bbe1fe850308eaf16cc8e9fb65d014..4fc424f1d9da84ea35c204b2717b81ccab365f6d 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1050,7 +1050,7 @@ static void make_cover_letter(struct rev_info *rev, int use_stdout,
 
        if (!use_stdout &&
            open_next_file(NULL, rev->numbered_files ? NULL : "cover-letter", rev, quiet))
-               return;
+               die(_("failed to create cover-letter file"));
 
        log_write_email_headers(rev, head, &pp.after_subject, &need_8bit_cte, 0);