Error when using a time scale with rounding

[moonchen]

I get a javascript error when using a time axis with rounding enabled, in chartjs 2.6.0.

Expected Behavior

Rounding was working in 2.5.0

Current Behavior

[Error] TypeError: minMoment.round is not a function. (In 'minMoment.round(timeOpts.round)', 'minMoment.round' is undefined)
buildTicks (Chart.bundle.js:17082)
update (Chart.bundle.js:11794)
getMinimumBoxSize (Chart.bundle.js:11062)
each (Chart.bundle.js:9515)
update (Chart.bundle.js:11076)
updateLayout (Chart.bundle.js:8577)
update (Chart.bundle.js:8543)
construct (Chart.bundle.js:8307)
Chart (Chart.bundle.js:10803)
onload (show:74)

Possible Solution

In scale.time.js, line 307, replace minMoment.round with minMoment.startOf

Steps to Reproduce (for bugs)

1. https://jsfiddle.net/moonchen/er7Lem6y/

Context

I'm trying to draw a time-series line chart and control the rounding on the x-axis.

Environment

• Chart.js version: 2.6.0
• Browser name and version: Tried in the latest Chrome and Safari
• Link to your project: N/A