System.TypeLoadException: Method 'GetFallbackPolicyAsync' ... does not have an implementation

[Mark Adamson]

I'm getting this when trying to run dotnet serve using .net core 3.0 rc1

System.TypeLoadException: Method 'GetFallbackPolicyAsync' in type 'McMaster.DotNet.Serve.NullAuthPolicyProvider' from assembly 'dotnet-serve, Version=1.3.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation

at McMaster.DotNet.Serve.Startup.ConfigureServices(IServiceCollection services)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)

dotnet --version
3.0.100-rc1-014190

googleapis/google-api-dotnet-client#1434 (comment) is a possible fix or workaround but needs to be done in the library itself I think

[Nate McMaster]

Looks like I’ll have to cross compile this app for .NET Core 3.0. It’s regrettably unavoidable. AspNetCore made breaking changes... :-/

[Nate McMaster]

b0e61af

Will be released as 1.4.0 later tonight.

[Mark Adamson]

Great, thanks for the speedy turnaround 🙂