Attach (recommended) or Link to PDF file here:
issue13500 (in test corpus)

This regressed when landing #13566. 

What is the expected behavior? (add screenshot)
<img width="664" alt="image" src="https://user-images.githubusercontent.com/942640/122467522-7bc8aa80-cf6f-11eb-9d4d-311eb7c64fb2.png">


What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/942640/122467565-85eaa900-cf6f-11eb-9c10-8a8686ed440c.png)


Object.assign(style, this.fill[$toStyle]());
    }
    if (this.corner.children.some(node => node.radius !== 0)) {
      const cornerStyles = this.corner.children.map(node => node[$toStyle]());
      if (cornerStyles.length === 2 || cornerStyles.length === 3) {
        const last = cornerStyles[cornerStyles.length - 1];
        for (let i = cornerStyles.length; i < 4; i++) {
          cornerStyles.push(last);
        }
      }
      style.borderRadius = cornerStyles.map(s => s.radius).join(" ");
    }
    switch (this.presence) {
      case "invisible":
      case "hidden":
        style.borderStyle = "";
        break;
      case "inactive":
        style.borderStyle = "none";
        break;
      default:
        style.borderStyle = edgeStyles.map(s => s.style).join(" ");
        break;
    }
    style.borderWidth = edgeStyles.map(s => s.width).join(" ");
    style.borderColor = edgeStyles.map(s => s.color).join(" ");
    return style;
  }
}
class Break extends XFAObject {