Roslyn 脚本：运行时异常的行号信息

我正在摆弄 Roslyn 脚本的东西（使用Microsoft.CodeAnalysis.CSharp.Scriptingnuget 包），我想知道是否有一种方法可以将行号信息添加到堆栈跟踪中，以了解脚本内发生的异常。

当我运行以下 C# 代码时：

// using Microsoft.CodeAnalysis.CSharp.Scripting;

var code = @"
var a = 0;
var b = 1 / a;
";
try
{
    await CSharpScript.RunAsync(code);
}
catch (DivideByZeroException dbze)
{
    Console.WriteLine(dbze.StackTrace);
}

写入控制台的堆栈跟踪是：

   at Submission#0.<<Initialize>>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Scripting.ScriptExecutionState.<RunSubmissionsAsync>d__9`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Scripting.Script`1.<RunSubmissionsAsync>d__21.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at UnitTests.ExploreRoslyn.<ScriptWithRuntimeError>d__4.MoveNext() in D:\dev\misc\netmockery\UnitTests\ExploreRoslyn.cs:line 47

请注意，如果我尝试捕获脚本内的异常，结果是类似的：

var code = @"
try  {
    var a = 0;
    var b = 1 / a;
}
catch (System.DivideByZeroException dbze)
{
    Console.WriteLine(dbze.StackTrace);
}
";
await CSharpScript.RunAsync(code);

这输出：

at Submission#0.<<Initialize>>d__0.MoveNext()

到控制台。

有没有办法让 Roslyn 脚本引擎在编译/执行脚本时添加调试信息，以便我可以在堆栈跟踪中获取行号信息？

我通过发出带有调试信息的（内存中）程序集来工作。

示例代码：

var code = @"
var a = 0;
var b = 1 / a;
";

var script = CSharpScript.Create(code);
var compilation = script.GetCompilation();
var ilstream = new MemoryStream();
var pdbstream = new MemoryStream();
compilation.Emit(ilstream, pdbstream);

var assembly = Assembly.Load(ilstream.GetBuffer(), pdbstream.GetBuffer());
var type = assembly.GetType("Submission#0");
var factory = type.GetMethod("<Factory>");
var submissionArray = new object[2];
Task<object> task = (Task<object>)factory.Invoke(null, new object[] { submissionArray });

try
{
    await task;
}
catch (DivideByZeroException dbze)
{
    Console.WriteLine(dbze.StackTrace);
}

输出是（注意:line 3在堆栈跟踪中）：

   at Submission#0.<<Initialize>>d__0.MoveNext() in :line 3
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at UnitTests.ExploreRoslyn.<ExploreEmittingAssembly>d__13.MoveNext() in D:\dev\misc\netmockery\UnitTests\ExploreRoslyn.cs:line 151

现在显然这有点像黑客，我对硬编码脚本引擎的实现细节并不满意（Submission#0, <Factory>），而且我真的不知道自己在做什么。应该有（也许有？）更好的方法。

Update

创建问题https://github.com/dotnet/roslyn/issues/13482 https://github.com/dotnet/roslyn/issues/13482在罗斯林问题跟踪器中。