format-patch: make --base patch-id output stable

diff --git a/builtin/am.c b/builtin/am.c
index 5556a0651e6d45b10cecbc6ec4918f8505d8ae11..912d9821b18acfa0a4c1e3bed8e6c9e7b43dcdf8 100644 (file)
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1502,11 +1502,11 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
                 * review them with extra care to spot mismerges.
                 */
                struct rev_info rev_info;
-               const char *diff_filter_str = "--diff-filter=AM";
 
                repo_init_revisions(the_repository, &rev_info, NULL);
                rev_info.diffopt.output_format = DIFF_FORMAT_NAME_STATUS;
-               diff_opt_parse(&rev_info.diffopt, &diff_filter_str, 1, rev_info.prefix);
+               rev_info.diffopt.filter |= diff_filter_bit('A');
+               rev_info.diffopt.filter |= diff_filter_bit('M');
                add_pending_oid(&rev_info, "HEAD", &our_tree, 0);
                diff_setup_done(&rev_info.diffopt);
                run_diff_index(&rev_info, 1);