wrong regexp format output

[novathore]

Bug report or Feature request?

Bug report

Version (complete output of terser -V or specific git commit)

terser 5.10.0

Complete CLI command or minify() options used

npx terser index.js --format ascii_only --ecma=2017

terser input

console.log(/(^|[^а-яё])([☎☏✆📠📞📱]|т\.|тел\.|ф\.|моб\.|факс|сотовый|мобильный|телефон)(:?\s*?)([+\d(][\d \u00A0\-()]{3,}\d)/gi)

terser output or error

console.log(/(^|[^\u0430-\u044f\u0451])([\u260e\u260f\u2706\u{1f4e0}\u{1f4de}\u{1f4f1}]|\u0442\.|\u0442\u0435\u043b\.|\u0444\.|\u043c\u043e\u0431\.|\u0444\u0430\u043a\u0441|\u0441\u043e\u0442\u043e\u0432\u044b\u0439|\u043c\u043e\u0431\u0438\u043b\u044c\u043d\u044b\u0439|\u0442\u0435\u043b\u0435\u0444\u043e\u043d)(:?\s*?)([+\d(][\d \u00A0\-()]{3,}\d)/gi);

Expected result
input regexp test on string '111111' ->> false
output regexp test on string '111111' ->> true

[artaommahe]

(based on this issue angular/angular-cli#22707)

[fabiosantoscode]

This seems to be caused by using the \u{hexhexhex} form in RegExps:

/📞/.test("📞") // => true
/\ud83d\udcde/.test("📞") // => true
/\u{1f4de}/.test("📞") // => false

[fabiosantoscode]

There we go! I'll release this on Monday