tree-diff: don't access hash of NULL object_id pointer

diff --git a/builtin/am.c b/builtin/am.c
index a2867f347b789fbca133586370d6dc8bbdf85edb..d9fdddac4affa80ac970e8084331f2ab1289f375 100644 (file)
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -563,7 +563,7 @@ static int copy_notes_for_rebase(const struct am_state *state)
                        goto finish;
                }
 
-               if (copy_note_for_rewrite(c, from_obj.hash, to_obj.hash))
+               if (copy_note_for_rewrite(c, &from_obj, &to_obj))
                        ret = error(_("Failed to copy notes from '%s' to '%s'"),
                                        oid_to_hex(&from_obj), oid_to_hex(&to_obj));
        }
@@ -879,12 +879,12 @@ static int hg_patch_to_mail(FILE *out, FILE *in, int keep_cr)
                if (skip_prefix(sb.buf, "# User ", &str))
                        fprintf(out, "From: %s\n", str);
                else if (skip_prefix(sb.buf, "# Date ", &str)) {
-                       unsigned long timestamp;
+                       timestamp_t timestamp;
                        long tz, tz2;
                        char *end;
 
                        errno = 0;
-                       timestamp = strtoul(str, &end, 10);
+                       timestamp = parse_timestamp(str, &end, 10);
                        if (errno)
                                return error(_("invalid timestamp"));
 
@@ -1312,7 +1312,7 @@ static int parse_mail(struct am_state *state, const char *mail)
        }
 
        if (is_empty_file(am_path(state, "patch"))) {
-               printf_ln(_("Patch is empty. Was it split wrong?"));
+               printf_ln(_("Patch is empty."));
                die_user_resolve(state);
        }
 
@@ -1351,19 +1351,16 @@ static int get_mail_commit_oid(struct object_id *commit_id, const char *mail)
        struct strbuf sb = STRBUF_INIT;
        FILE *fp = xfopen(mail, "r");
        const char *x;
+       int ret = 0;
 
-       if (strbuf_getline_lf(&sb, fp))
-               return -1;
-
-       if (!skip_prefix(sb.buf, "From ", &x))
-               return -1;
-
-       if (get_oid_hex(x, commit_id) < 0)
-               return -1;
+       if (strbuf_getline_lf(&sb, fp) ||
+           !skip_prefix(sb.buf, "From ", &x) ||
+           get_oid_hex(x, commit_id) < 0)
+               ret = -1;
 
        strbuf_release(&sb);
        fclose(fp);
-       return 0;
+       return ret;
 }
 
 /**
@@ -1372,40 +1369,33 @@ static int get_mail_commit_oid(struct object_id *commit_id, const char *mail)
  */
 static void get_commit_info(struct am_state *state, struct commit *commit)
 {
-       const char *buffer, *ident_line, *author_date, *msg;
+       const char *buffer, *ident_line, *msg;
        size_t ident_len;
-       struct ident_split ident_split;
-       struct strbuf sb = STRBUF_INIT;
+       struct ident_split id;
 
        buffer = logmsg_reencode(commit, NULL, get_commit_output_encoding());
 
        ident_line = find_commit_header(buffer, "author", &ident_len);
 
-       if (split_ident_line(&ident_split, ident_line, ident_len) < 0) {
-               strbuf_add(&sb, ident_line, ident_len);
-               die(_("invalid ident line: %s"), sb.buf);
-       }
+       if (split_ident_line(&id, ident_line, ident_len) < 0)
+               die(_("invalid ident line: %.*s"), (int)ident_len, ident_line);
 
        assert(!state->author_name);
-       if (ident_split.name_begin) {
-               strbuf_add(&sb, ident_split.name_begin,
-                       ident_split.name_end - ident_split.name_begin);
-               state->author_name = strbuf_detach(&sb, NULL);
-       } else
+       if (id.name_begin)
+               state->author_name =
+                       xmemdupz(id.name_begin, id.name_end - id.name_begin);
+       else
                state->author_name = xstrdup("");
 
        assert(!state->author_email);
-       if (ident_split.mail_begin) {
-               strbuf_add(&sb, ident_split.mail_begin,
-                       ident_split.mail_end - ident_split.mail_begin);
-               state->author_email = strbuf_detach(&sb, NULL);
-       } else
+       if (id.mail_begin)
+               state->author_email =
+                       xmemdupz(id.mail_begin, id.mail_end - id.mail_begin);
+       else
                state->author_email = xstrdup("");
 
-       author_date = show_ident_date(&ident_split, DATE_MODE(NORMAL));
-       strbuf_addstr(&sb, author_date);
        assert(!state->author_date);
-       state->author_date = strbuf_detach(&sb, NULL);
+       state->author_date = xstrdup(show_ident_date(&id, DATE_MODE(NORMAL)));
 
        assert(!state->msg);
        msg = strstr(buffer, "\n\n");
@@ -1413,6 +1403,7 @@ static void get_commit_info(struct am_state *state, struct commit *commit)
                die(_("unable to parse commit %s"), oid_to_hex(&commit->object.oid));
        state->msg = xstrdup(msg + 2);
        state->msg_len = strlen(state->msg);
+       unuse_commit_buffer(commit, buffer);
 }
 
 /**
@@ -1940,7 +1931,8 @@ static void am_resolve(struct am_state *state)
 
        if (unmerged_cache()) {
                printf_ln(_("You still have unmerged paths in your index.\n"
-                       "Did you forget to use 'git add'?"));
+                       "You should 'git add' each file with resolved conflicts to mark them as such.\n"
+                       "You might run `git rm` on a file to accept \"deleted by them\" for it."));
                die_user_resolve(state);
        }
 
@@ -2156,7 +2148,7 @@ static void am_abort(struct am_state *state)
        am_rerere_clear();
 
        curr_branch = resolve_refdup("HEAD", 0, curr_head.hash, NULL);
-       has_curr_head = !is_null_oid(&curr_head);
+       has_curr_head = curr_branch && !is_null_oid(&curr_head);
        if (!has_curr_head)
                hashcpy(curr_head.hash, EMPTY_TREE_SHA1_BIN);