aspnetcore: .NET Core 3.0 Preview 1 makes app fail to start

From @godrose on Tuesday, 18 December 2018 06:44:00

Issue Title

Using latest version of .NET Core 3.0.0 SDK (009812) introduces regression into an existing app

General

Upgrading to the preview version and using it instead of 2.2.0 results in the following exception during app start:

Application startup exception: System.InvalidOperationException: Scheme already exists: ASOS
   at Microsoft.AspNetCore.Authentication.AuthenticationOptions.AddScheme(String name, Action1 configureBuilder)
   at Microsoft.Extensions.Options.OptionsFactory1.Create(String name)
   at System.Lazy1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy1.CreateValue()
   at Microsoft.AspNetCore.Authentication.AuthenticationSchemeProvider..ctor(IOptions1 options, IDictionary2 schemes)

Copied from original issue: dotnet/core#2160

About this issue

Original URL
State: closed
Created 6 years ago
Comments: 20 (10 by maintainers)

Most upvoted comments

Hi @godrose , unfortunately almost everyone is out of the office right now. We should be able to get back to this first thing in the new year.

Eilon on Dec 28, 2018