I've found it working with Stage so I don't know if it happens with real laser devices too. For some reason, PLAYER_LASER_REQ_SET_CONFIG request response must be checked for NULL pointer. If the response is NULL, PLAYER_LASER_REQ_GET_CONFIG request should be sent, otherwise Segmentation Fault occurs. This patch fixes that, but I'm still wondering why other devices doesn't need this NULL pointer check right after setter configuration request.
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