Stacked Logarithmic axes with a 0 data point crashes page

[NJLucyk]

Expected Behavior

Chart should not break page

Current Behavior

Chart breaks page

Possible Solution

Steps to Reproduce (for bugs)

Go to https://jsfiddle.net/kadeyuy/r190msc6/18/ and change the stacked from false to true and hit run and the page will crash.

Context

Trying to have a stacked logarithmic bar graph so that I can show how different data sets contribute to total number while also being able to see smaller data points.

Environment

• Chart.js version: 2.6
• Browser name and version: Chrome Version 59.0.3071.115 (Official Build) (64-bit)

[NJLucyk]

Looks like the problem is that minNotZero is not set. The code for that is at

Chart.js/src/scales/scale.logarithmic.js

Line 50 in 5d95280

if (opts.stacked || hasStacks) {

which leaves me.minNotZero equal to null instead of setting it.

Adding

if (value !== 0 && (me.minNotZero === null || value < me.minNotZero)) {
    me.minNotZero = value;
}

To the bottom of the if clause appears to fix the problem.

[jcopperfield]

@etimberg This issue has been addressed through PR #4959.