Compiled regex patterns like "(?<=()*?)a" thow exception `Bad label content in ILGenerator.`

[longxya]

Description

When Compiled regex patterns contain lookbehind assertions, and lookbehind assertion contain a group construction or anchor which quantifier is lazy and minimum = 0, the .NET regex engine throws Bad label content in ILGenerator.

Reproduction Steps

using System;
using System.Text.RegularExpressions;

string input = "a";
string pattern="(?<=()??)a";
//pattern="(?<=()*?)a";
//pattern="(?<=(){0,100}?)a";
//pattern="(?<!()*?)a";
//pattern="(?<=(?:)*?)a";
//pattern="(?<=(wtf)*?)a";
//pattern="(?<=^*?)a";
//pattern=@"(?<=\A*?)a";
//pattern=@"(?<=(wtf)*?)b";

//pattern="(?<=(wtf)*?)";//this pattern would not throw Exception
try
{
	Match matchCompiled = new Regex(pattern, RegexOptions.Compiled).Match(input);
	Console.WriteLine(matchCompiled.Value);
}
catch(Exception ex)
{
	Console.WriteLine(ex.Message);
}

Expected behavior

Output:

a

Actual behavior

Output:

Bad label content in ILGenerator.

Regression?

No response

Known Workarounds

No response

Configuration

No response

Other information

No response