Legend for shape is not visible with color and size

[vivekratnavel]

Cannot see all the three legends for the following spec.

{
  "marktype": "point",
  "encoding": {
    "x": {"name": "Origin","type": "O"},
    "y": {"name": "Cylinders","type": "O"},
    "size": {"name": "Displacement","type": "Q"},
    "color": {"name": "Horsepower","type": "Q"},
    "shape": {"bin": {"maxbins": 15},"name": "Miles_per_Gallon","type": "Q"}
  },
  "config": {"singleHeight": 400,"singleWidth": 400,"largeBandMaxCardinality": 20},
  "data": {"url": "data/cars.json"}
}

Removing either of the color or size brings up legend for shape.

[kanitw]

Thanks for reporting issues.

This is actually a vega-lite issue. Also, it is redundant with vega/vega-lite#131 so I'm closing this for now. #131 is in the roadmap and will be fixed once we migrate to vega2.