运行UITests时，将HTML转换为String会崩溃

Question

我正在尝试将RSS Feed从RSS Feed转换为String并在UILabel中显示。

这是我在String扩展中的代码：

var html2AttributedString: NSAttributedString? {

    guard
        let data = data(using: String.Encoding.utf8)
        else { return nil }

    do {
        return try NSAttributedString(data: data , options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: String.Encoding.utf8.rawValue], documentAttributes: nil)
    } catch {
        print("error:", error)
        return nil
    }
}
var html2String: String {
    return html2AttributedString?.string ?? ""
}

我在这里称之为：

self.lblDescription.text = article.articleDescription.html2String

当我运行应用程序时，此代码正常工作，从未崩溃。但是当我在TestUI中运行此代码时，它有时会崩溃（5个中的2个）：

let app = XCUIApplication()
let tablesQuery = app.tables

这是错误：

Thread 1: EXC_BREAKPOINT (code=1, subcode=0x1827ece5c)


    0x10095a350 <+132>: ldr    x21, [sp, #0x40]
    0x10095a354 <+136>: bl     0x10095c7d4               ; @nonobjc (extension in UIKit):__ObjC.NSAttributedString.init(data: Foundation.Data, options: Swift.Dictionary<Swift.String, Any>, documentAttributes: Swift.Optional<Swift.AutoreleasingUnsafeMutablePointer<Swift.Optional<__ObjC.NSDictionary>>>) throws -> __ObjC.NSAttributedString at AppExtensions.swift
->  0x10095a358 <+140>: mov    x8, x21
    0x10095a35c <+144>: mov    x1, x8