list-objects.c: don't add an unparsed NULL as a pending tree

diff --git a/list-objects.c b/list-objects.c
index 5a4af62bdc8b939939511ff66151343cda25a45d..518c6650e1827567be48976138aff621dc50eb92 100644 (file)
--- a/list-objects.c
+++ b/list-objects.c
@@ -147,7 +147,12 @@ void traverse_commit_list(struct rev_info *revs,
        struct commit *commit;
 
        while ((commit = get_revision(revs)) != NULL) {
-               add_pending_tree(revs, commit->tree);
+               /*
+                * an uninteresting boundary commit may not have its tree
+                * parsed yet, but we are not going to show them anyway
+                */
+               if (commit->tree)
+                       add_pending_tree(revs, commit->tree);
                show_commit(commit);
        }
        for (i = 0; i < revs->pending.nr; i++) {