Is it possible/expected to have a model without element? When clicking its link in the outliner, Gazebo crashes due to Ogre bbox error. My use case is a composing a world with nested models, instead of a flat list. Nested elements lock the physics -- I'll post a separate question to figure out the best approach.

gzclient: /build/ogre-1.9-B6QkmW/ogre-1.9-1.9.0+dfsg1/OgreMain/include/OgreAxisAlignedBox.h:252: void Ogre::AxisAlignedBox::setExtents(const Ogre::Vector3&, const Ogre::Vector3&): Assertion `(min.x <= max.x && min.y <= max.y && min.z <= max.z) && "The minimum corner of the box must be less than or equal to maximum corner"' failed.

model.sdf:

<sdf version="1.6">
  <model name="my_room">
    <static>true</static>
    <link name="link">
      <collision name="collision">
        <pose>0 0 0 0 0 0</pose>
        <geometry>
          <box>
            <size>10 10 0.1</size>
          </box>
        </geometry>
      </collision>
    </link>
  </model>
</sdf>