./uuid.rs:90:41: 99:9 error: mismatched types: expected `bool` but found `()` (bool vs ())
./uuid.rs:90         do uint::range(0u, 100000u) |_i| {
./uuid.rs:91             let uuid = uuid();
./uuid.rs:92             assert uuid == from_str(to_str(uuid));
./uuid.rs:93
./uuid.rs:94             let uuid = uuid_random();
./uuid.rs:95             assert uuid == from_str(to_str(uuid));