Plot.raster crashes when fill is given as variable css color #1236
Description
Plot.raster([[1, 1], [2, 1], [2, 2]], {x: "0", y: "1", fill: () => "red"}).plot()
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Plot.raster([[1, 1], [2, 1], [2, 2]], {x: "0", y: "1", fill: () => "red"}).plot()