HttpClient not returning data, logging response or throwing exception

[dylanberry]

Description

HttpClient not returning data, logging response or throwing exception.

Steps to Reproduce

Tested on iOS iPhone X 11.3 Simulator

const string url = "https://www.meetup.com/TorontoMobileDevelopers/events/rss/";
using (var client = new HttpClient(new TestHttpTracer.HttpTracerHandler()))
{
    var result = await client.GetStringAsync(url).ConfigureAwait(false);
}

Result is null, but should match the response from the url as seen via the browser.

Expected Behavior

HttpClient returns data and logs response.

Actual Behavior

HttpClient returns null and does not log or throw an exception.

Basic Information

=== Visual Studio Enterprise 2017 for Mac ===

Version 7.5.1 (build 22)
Installation UUID: d5d95059-9c23-453f-ab75-c9e751d1512f
Runtime:
    Mono 5.10.1.47 (2017-12/8eb8f7d5e74) (64-bit)
    GTK+ 2.24.23 (Raleigh theme)
    Xamarin.Mac 4.4.1.178 (master / eeaeb7e6)

    Package version: 510010047

=== NuGet ===

Version: 4.3.1.4445

=== .NET Core ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
    2.0.5
    2.0.0-preview2-25407-01
    1.1.2
    1.0.5
SDK: /usr/local/share/dotnet/sdk/2.1.4/Sdks
SDK Versions:
    2.1.4
    2.0.0-preview2-006497
    1.0.4
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/5.10.1/lib/mono/msbuild/15.0/bin/Sdks

=== Xamarin.Profiler ===

Version: 1.6.2
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Apple Developer Tools ===

Xcode 9.3.1 (14154.1)
Build 9E501

=== Xamarin.Mac ===

Version: 4.4.1.178 (Visual Studio Enterprise)

=== Xamarin.Android ===

Version: 8.3.0.19 (Visual Studio Enterprise)
Android SDK: /Users/dylanberry/Library/Developer/Xamarin/android-sdk-macosx
    Supported Android versions:
        5.1 (API level 22)
        6.0 (API level 23)
        7.0 (API level 24)
        7.1 (API level 25)
        8.1 (API level 27)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 27.0.1
SDK Build Tools Version: 27.0.3

Java SDK: /usr
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Xamarin.iOS ===

Version: 11.10.1.178 (Visual Studio Enterprise)
Hash: 408d3574
Branch: d15-7
Build date: 2018-05-08 18:56:30-0400

=== Xamarin Inspector ===

Version: 1.4.0
Hash: b3f92f9
Branch: master
Build date: Fri, 19 Jan 2018 22:00:34 GMT
Client compatibility: 1

=== Build Information ===

Release ID: 705010022
Git revision: 60442dd643a20c7a4ae1f8705b8d1de8972eee78
Build date: 2018-05-15 01:43:39+00
Xamarin addins: 4194ffe4868321e4c3477bd56aed579bda4c6fbb

=== Operating System ===

Mac OS X 10.13.4
Darwin 17.5.0 Darwin Kernel Version 17.5.0
    Mon Mar  5 22:24:32 PST 2018
    root:xnu-4570.51.1~1/RELEASE_X86_64 x86_64

=== Enabled user installed addins ===

MFractor 3.05.12
Internet of Things (IoT) development (Preview) 7.5

[DanielCauser]

We should make a template out of the bug you reported :)