Can't control decal pattern per series

[sthenault]

Version

5.0.2

Reproduction link

https://jsfiddle.net/w8a6k35v/

Steps to reproduce

Activate decal then attempt to control pattern for each series.

What is expected?

Pattern for each series is defined by what's defined in series' itemStyle.decal

What is actually happening?

what's defined in series' itemStyle.decal is ignored for a randomly selected patter

---

I would like to control echarts decal pattern in a stacked bar chart. By reading https://echarts.apache.org/en/option.html#series-bar.itemStyle.decal(Object%20%7C%20'none') I supposed I could configure here, for each series, the pattern to use - the idea being that several series of the same stack should use the same pattern.

However, when decal are activated (https://echarts.apache.org/en/option.html#aria.decal.show), it seems to ignore the per-series settings (admittedly I only attempted to set "symbol"). Worse, if I set decal='none' as documented for a series itemStyle.decal, I get a ton of style.js:97 Uncaught TypeError: Cannot create property 'dirty' on string 'none' error messages in the console and the chart doesn't display.

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[Ovilia]

According to the doc, series level decal should be set to aria.decal.decals instead of series.decal.

[helgasoft]

see demo in #19619