在执行gmapping建图时报错

[ WARN] [1561778789.182300420]: Clearing costmap to unstuck robot (3.000000m).
[ WARN] [1561778794.382318817]: Rotate recovery behavior started.
[ERROR] [1561778798.389168489]: Rotate recovery can't rotate in place because there is a potential collision. Cost: -1.00
[ WARN] [1561778803.591354498]: Clearing costmap to unstuck robot (1.840000m).

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要注意:  小车尺寸的配置, 导航膨胀区的设置, 场景的空间最好保持是小车2.5倍大

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