task.state.rethrowFailure() >> { throw failure }
    }

    private static class MockLock implements ResourceLock {
        final Thread owner = Thread.currentThread()
        final ProjectInternal project
        boolean locked
        final Collection<MockLock> locks

        MockLock(ProjectInternal project, Collection<MockLock> locks) {
            this.locks = locks
            this.project = project
        }