Issues with hosting in sandbox AppDomain in 64bit process

[sasha-uk]

The following code gives unexpected results if executed in 64bit process (.NET45).

class Program
{
    static void Main(string[] args)
    {
        var appDomainSetup = new AppDomainSetup { ApplicationBase = Environment.CurrentDirectory };
        var permissionSet = new PermissionSet(PermissionState.None);
        permissionSet.AddPermission(new SecurityPermission(PermissionState.Unrestricted));
        permissionSet.AddPermission(new FileIOPermission(PermissionState.Unrestricted));
        permissionSet.AddPermission(new ReflectionPermission(PermissionState.Unrestricted));
        var appDomain = AppDomain.CreateDomain("PhytonSandbox", null, appDomainSetup, permissionSet);
        var sandbox = (Sandbox)appDomain.CreateInstanceAndUnwrap(typeof(Sandbox).Assembly.FullName, typeof(Sandbox).FullName);

        sandbox.Execute("print \"{0}\".format(42.1234)");
        sandbox.Execute("import math" + Environment.NewLine + 
                        "print \"{0}\".format(math.fabs(-1))");
        Console.ReadLine();
    }

    public class Sandbox : MarshalByRefObject
    {
        public void Execute(string script)
        {
            var scriptEngine = Python.CreateEngine();
            var source = scriptEngine.CreateScriptSourceFromString(script, SourceCodeKind.Statements);
            var compiledCode = source.Compile();
            var scope = scriptEngine.CreateScope();
            compiledCode.Execute(scope);
        }
    }
}

OUTPUT ON 32bit (CORRECT)
42.1234
1.0

OUTPUT ON 64bit (INCORRECT)
1.2e-314
0.0

Changing the permission set to PermissionSet(PermissionState.Unrestricted) will result in the correct output on 64bit.

IronPython version 2.7.5.1000

[slide]

Do you just set the output mode for the assembly to 64bit?