Broken debug log

[59naga]

[Error] TypeError: undefined is not an object (evaluating 'n.innerHTML.length')
    （anonymous 関数） (pkgs.min.js, line 13)
    convertToSVG (pkgs.min.js, line 13)
    onload (pkgs.min.js, line 13)

console.log('jaggy:rendered', cacheUrl, svg.innerHTML.length.toLocaleString());