I’m not sure this is where I need to put this or if you guys are even entertaining bugs for the M1 yet, but here goes…

Repro steps

Debugging the default console “hello world” project in VSCode results in an apparent crash of the debugger:

namespace test
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }
}

Debug Console output:

-------------------------------------------------------------------
You may only use the Microsoft .NET Core Debugger (vsdbg) with
Visual Studio Code, Visual Studio or Visual Studio for Mac software
to help you develop and test your applications.
-------------------------------------------------------------------
Loaded '/usr/local/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/System.Private.CoreLib.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
Stack overflow.
   at System.Collections.HashHelpers.GetPrime(Int32)
   at System.Collections.Generic.Dictionary`2[[System.__Canon, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Initialize(Int32)
   at System.Collections.Generic.Dictionary`2[[System.__Canon, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]..ctor(Int32, System.Collections.Generic.IEqualityComparer`1<System.__Canon>)
   at System.AppContext.Setup(Char**, Char**, Int32)

Running the dll from the command line in a terminal window is successful:

johncoleman@edgar net5.0 % ls
ref                             test.dll                        test.runtimeconfig.dev.json
test.deps.json                  test.pdb                        test.runtimeconfig.json
johncoleman@edgar net5.0 % dotnet test.dll 
Hello World!
johncoleman@edgar net5.0 % 

Crash is reproducible, happens every time.

Thanks.