# Bug Report ## Steps to reproduce 1. Set `total: 6`, `value: [1, 4, 1, 0]` and `precision: 0.1` in multiple progress 2. Invoke `progress()` twice ## Expected result No console error is shown. ## Actual result A console error is shown. ## Testcase https://jsfiddle.net/qtnux0s6/ ## Screenshot (when possible) <img width="475" alt="スクリーンショット 2019-08-25 18 12 10" src="https://user-images.githubusercontent.com/14275842/63647993-184f0680-c764-11e9-8b6c-34e5e2ba4063.png"> ## Version 2.7.7