I am trying to draw a bar chart with chart.js that uses multiple labels so that I can manipulate them. I have managed to do it with a line chart and tried extending what I did there with no luck. I am getting this error. what could be causing it?

Uncaught TypeError: Object.defineProperty called on non-object.

The issue is somewhere in the data: {} because when I had data as a simple 2 index array it was working fine.

edit: when stepping through dataset = null;

        var com_passed = rows[rows.length-2][# Common Passed];

        var com_failed = rows[rows.length-2][# Common Failed];

        var ctx = document.getElementById(common_chart);

        ctx.height = 50;



        var historicalChart = new Chart(ctx, {

            type: 'bar',

            data: {

                labels: [Passed, Failed],

                datasets: [

                { 

                    data: com_passed,

                    label: Passed,

                    fillColor: red

                },

                { 

                    data: com_failed,

                    label: Failed,

                    fillColor: green                      

                }

                    ]

            },

                options: {

                    scales: {

                        yAxes: [{

                            ticks: {

                            beginAtZero:true,

                            responsive: false,

                            maintainAspectRatio: true

                            }

                        }]

                    }

                }

        });