Bug Report

🔎 Search Terms

regex, RegExp

🕗 Version & Regression Information

• This is the behavior in every version I tried.

⏯ Playground Link

Playground link with relevant code

💻 Code

const REGEX_PATTERN_2: RegExp = new RegExp(`(?i:'s|'t|'re|'ve|'m|'ll|'d)|[^\\r\\n\\p{L}\\p{N}]?\\p{L}+|\\p{N}{1,3}| ?[^\\s\\p{L}\\p{N}]+[\\r\\n]*|\\s*[\\r\\n]+|\\s+(?!\\S)|\\s+`, "g");
const str = "This is a TopGame";
let match;
while ((match = REGEX_PATTERN_2.exec(str)) !== null) {
    console.log(`Match found at position ${match.index}.`);
    console.log(`Matched string: ${match[0]}.`);
}

🙁 Actual behavior

SyntaxError: Invalid regular expression: /(?i:'s|'t|'re|'ve|'m|'ll|'d)|[^\r\n\p{L}\p{N}]?\p{L}+|\p{N}{1,3}| ?[^\s\p{L}\p{N}]+[\r\n]|\s[\r\n]+|\s+(?!\S)|\s+/: Invalid group

🙂 Expected behavior

The regular expression should be compiled properly.