enter work: {'w': 0}
enter phase: {'w': 0, 'p': 0}
enter step1: {'w': 0, 'p': 0, 's': 1}
enter step2: {'w': 0, 'p': 99, 's': 2}
before pause: {'work': {'w': 0}, 'phase': {'p': 99}, 'step2': {'s': 77}}
enter paused: {}
paused: {}
enter work: {'w': 0}
enter phase: {'w': 0, 'p': 99}
enter step2: {'w': 0, 'p': 99, 's': 77}
resumed (deep): {'work': {'w': 0}, 'phase': {'p': 99}, 'step2': {'s': 77}}
OK deep history
