Build error in 5.6.1 when command depends on a CancellationToken from ConsoleAppFramework

[djeikyb]

In version 5.6.1, I'm getting a build error when trying to use an async command with a CancellationToken. Version 5.5.0 builds just fine, so I'm suspecting it's a bug?

error CS0103: The name '__ExternalCancellationToken__' does not exist in the current context

full repo

/Users/jacob/dev/me/active/CafSample/obj/Debug/net9.0/ConsoleAppFramework/ConsoleAppFramework.ConsoleAppGenerator/ConsoleApp.Run.g.cs(30,77): error CS0103: The name '__ExternalCancellationToken__' does not exist in the current context

The build failed. Fix the build errors and run again.

using ConsoleAppFramework;

await ConsoleApp.RunAsync(args, Commands.Save);

static class Commands
{
    /// <summary>
    /// Some sort of save command.
    /// </summary>
    public static async Task<int> Save(CancellationToken ct)
    {
        await Task.Delay(1000);
        return 0;
    }
}

Same result with:

using System.Threading;
using System.Threading.Tasks;
using ConsoleAppFramework;

await ConsoleApp.RunAsync(args, async (CancellationToken ct) => await Task.Delay(1000, ct));

I tried running in a docker container (mcr.microsoft.com/dotnet/sdk:9.0) to avoid any weirdness with early releases of dotnet 10 I've installed.

root@78e35801fe2e:/src# rm -fr {bin,obj] ; dotnet run
/src/obj/Debug/net9.0/ConsoleAppFramework/ConsoleAppFramework.ConsoleAppGenerator/ConsoleApp.Run.g.cs(28,77): error CS0103: The name '__ExternalCancellationToken__' does not exist in the current context

The build failed. Fix the build errors and run again.

root@78e35801fe2e:/src# dotnet --info
.NET SDK:
 Version:           9.0.306
 Commit:            cc9947ca66
 Workload version:  9.0.300-manifests.87361a52
 MSBuild version:   17.14.28+09c1be848

Runtime Environment:
 OS Name:     debian
 OS Version:  12
 OS Platform: Linux
 RID:         linux-arm64
 Base Path:   /usr/share/dotnet/sdk/9.0.306/

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
  Version:      9.0.10
  Architecture: arm64
  Commit:       e1f19886fe

.NET SDKs installed:
  9.0.306 [/usr/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 9.0.10 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 9.0.10 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

[neuecc]

Thank you, this is a bug!
I'll fix it.

[neuecc]

v5.6.2 fixed.