Repro for stack overflow issue: https://github.com/dotnet/roslyn/issues/6536

repro.cs

        [Fact]
        public void TestStackOverflow()
        {
            var longCode = "";
            for (var i = 0; i<3000; i++)
            {
                longCode += @"""asdf"" + ";
            }
            var code = @"class Foo
{
    void Bar()
    {
        string test = " +  longCode + @"
    }
}";
            var tree = SyntaxFactory.ParseSyntaxTree(code);
            var position = 4000; 
            var trivia = tree.GetCompilationUnitRoot().FindTrivia(position);
        }