Cannot get async to work in self hosted nancy

[marten-gustafsson-blinfo-se]

Prerequisites

• [x] I have written a descriptive issue title
• [x] I have verified that I am running the latest version of Nancy
• [x] I have verified if the problem exist in both DEBUG and RELEASE mode
• [x] I have searched open and closed issues to ensure it has not already been reported

Description

Call to await Task.Delay(1000*seconds).ConfigureAwait(false); seems to block

Steps to Reproduce

Download the attached VS2017 solution, restore NuGet packages. Start the application in VS. Open "localhost:8888/sleep/60. Open "localhost:8888/echo/hello". The call to hello will be processed after the call to sleep.

System Configuration

• Nancy version: v2.0.0-clinteastwood
• Nancy host
  • [x ] Nancy.Hosting.Self
• Other Nancy packages and versions:
• Environment (Operating system, version and so on): Windows 10
• .NET Framework version: 4.7.1
• Additional information: Most probably I have configured something badly. Async is pretty important in self hosted Nancy since it is single threaded. You are free to resuse the attached code as an example application. nancy-async-test.zip

[abasau]

This is a duplicate of issue #2714.