1@@2expression c;3@@4- &c->maybe_tree->object.oid5+ get_commit_tree_oid(c)67@@8expression c;9@@10- c->maybe_tree->object.oid.hash11+ get_commit_tree_oid(c)->hash1213@@14expression c;15@@16- c->maybe_tree17+ get_commit_tree(c)1819@@20expression c;21expression s;22@@23- get_commit_tree(c) = s24+ c->maybe_tree = s2526@@27expression c;28@@29- return get_commit_tree(c);30+ return c->maybe_tree;