Regular expression parsing error

[Taritsyn]

Hello, Dmitry!

When parsing a [^]*?(:[rp][el]a[\w-]+)[^]* regular expression, the following error occurs:

NiL.JS.Core.JSException: SyntaxError: parsing '[^]*?(:[rp][el]a[\w-]+)[^]*' - Unterminated [] set.
   at NiL.JS.ExceptionHelper.Throw(Error error)
   at NiL.JS.BaseLibrary.RegExp.makeRegex(String pattern, String flags)
   at NiL.JS.Expressions.RegExpExpression.Evaluate(Context context)
   at NiL.JS.Expressions.Assignment.Evaluate(Context context)
   at NiL.JS.Statements.VariableDefinition.Evaluate(Context context)
   at NiL.JS.Statements.CodeBlock.evaluateLines(Context context, Int32 i, Boolean clearSuspendData)
   at NiL.JS.Statements.CodeBlock.Evaluate(Context context)
   at NiL.JS.Core.Context.Eval(String code, JSValue thisBind, Boolean suppressScopeCreation)
   at TestNilJs.Program.Main(String[] args) in C:\Projects\!EXPERIMENTAL\NiL.JS\TestNilJs\TestNilJs\Program.cs:line 12

This error does not occur in the latest versions of V8 and ChakraCore, but is also typical for Jurassic and Jint.

You can use the following C#-code to reproduce the error:

using System;

using NiL.JS.Core;

namespace TestNilJs
{
    class Program
    {
        static void Main(string[] args)
        {
            const string code = @"var na = /[^]*?(:[rp][el]a[\w-]+)[^]*/;";
            var context = new Context(true);

            try
            {
                context.Eval(code);
            }
            catch (JSException e)
            {
                Console.Write(e.ToString());
            }
        }
    }
}

[nilproject]

Hello, Andrey!
Yes, it's known bug. It's because I used System.Text.RegularExpressions, which is not fully compatible with JavaScript RegExp.

[Taritsyn]

OK. Looks like that this issue needs to be sent to Microsoft.