roslyn: Cannot compile PDB on Mono - CS0041: Unexpected error writing debug information -- 'The method or operation is not implemented.'

There is sample:

using System;
using System.IO;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;

namespace TestR
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            var code = @"                        
                        namespace TestR
                        {
                            class MainClass
                            {
                                public static void AAA (string[] args)
                                {
                                }
                            }
                        }
                        ";

            var syntaxTree = CSharpSyntaxTree.ParseText(code);

            var references = new [] {
                MetadataReference.CreateFromFile (typeof(Type).Assembly.Location)
            };

            var compilation = CSharpCompilation.Create(
                "assembly",
                new[] {syntaxTree},
                references,
                new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));


            using (var ms = new MemoryStream ())
            using (var pdbs = new MemoryStream ()) 
            {
                var result = compilation.Emit (ms, pdbs);

                if (!result.Success) 
                {
                    throw new Exception ("Not compiled: " + result.Diagnostics[0]);
                }

                Console.WriteLine ("Compiled and saved");
            }
        }
    }
}

But if I remove pdbs from compilation.Emit (ms, pdbs) that will compile successfully. Running without mono all works.