Mono 4.4.1 breaks Suave testing

[haf]

Here's the build https://travis-ci.org/SuaveIO/suave/jobs/141560408#L1532

When mono is functional again we can add 4.4.1 to the build matrix.

Output:

OSVersion: Unix 3.13.0.63; running 64-bit process on 64-bit operating system.

Running tests with default TCP engine.

performance tests/perf-POST: Exception: System.AggregateException: One or more errors occurred. ---> System.ObjectDisposedException: Cannot access a disposed object.

Object name: 'System.Net.Sockets.NetworkStream'.

  at System.Net.WebConnectionStream.EndWrite (IAsyncResult r) <0x4206a5c0 + 0x0039f> in <filename unknown>:0 

  at System.IO.Stream.<BeginEndWriteAsync>m__8 (System.IO.Stream stream, IAsyncResult asyncResult) <0x7fe12756b7d0 + 0x0001b> in <filename unknown>:0 

  at (wrapper delegate-invoke) System.Func`3[System.IO.Stream,System.IAsyncResult,System.Threading.Tasks.VoidTaskResult]:invoke_TResult_T1_T2 (System.IO.Stream,System.IAsyncResult)

  at System.Threading.Tasks.TaskFactory`1+FromAsyncTrimPromise`1[TResult,TInstance].Complete (TInstance thisRef, System.Func`3 endMethod, IAsyncResult asyncResult, Boolean requiresSynchronization) <0x7fe127899ca0 + 0x00064> 25524 in <filename unknown>:0 

--- End of stack trace from previous location where exception was thrown ---

  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x7fe1275a62a0 + 0x00029> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x7fe1275a4170 + 0x000a7> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x7fe1275a40f0 + 0x0006b> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x7fe1275a40a0 + 0x0003a> in <filename unknown>:0 

  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () <0x7fe1275a46e0 + 0x00012> in <filename unknown>:0 

  at System.Net.Http.HttpClientHandler+<SendAsync>c__async0.MoveNext () <0x41eecbd0 + 0x00fb8> in <filename unknown>:0 

--- End of stack trace from previous location where exception was thrown ---

  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x7fe1275a62a0 + 0x00029> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x7fe1275a4170 + 0x000a7> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x7fe1275a40f0 + 0x0006b> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x7fe1275a40a0 + 0x0003a> in <filename unknown>:0 

  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () <0x7fe1275a48e0 + 0x00017> in <filename unknown>:0 

  at System.Net.Http.HttpClient+<SendAsyncWorker>c__async0.MoveNext () <0x41eeb510 + 0x0049f> in <filename unknown>:0 

  --- End of inner exception stack trace ---

  at System.Threading.Tasks.Task.ThrowIfExceptional (Boolean includeTaskCanceledExceptions) <0x7fe127647790 + 0x00037> in <filename unknown>:0 

  at System.Threading.Tasks.Task.Wait (Int32 millisecondsTimeout, CancellationToken cancellationToken) <0x7fe127648e10 + 0x000c7> in <filename unknown>:0 

  at Suave.Testing.send (System.Net.Http.HttpClient client, TimeSpan timeout, Suave.SuaveTestCtx ctx, System.Net.Http.HttpRequestMessage request) <0x41ee9110 + 0x002e5> in <filename unknown>:0 

  at Suave.Testing+reqResp@184[b,a].Invoke (Suave.SuaveTestCtx ctx) <0x41ee3720 + 0x00213> in <filename unknown>:0 

  at Suave.Testing.withContext[a] (Microsoft.FSharp.Core.FSharpFunc`2 f, Suave.SuaveTestCtx ctx) <0x41ee3200 + 0x00023> in <filename unknown>:0 

  at Suave.Testing+reqResp@184-1[b].Invoke (Suave.SuaveTestCtx ctx) <0x41ee2ed0 + 0x0003b> in <filename unknown>:0 

  at Suave.Tests.Perf.testF@33-1 (Microsoft.FSharp.Core.FSharpTypeFunc get, System.String longData, Suave.Tests.SuavePerfHarness harness, Microsoft.FSharp.Core.Unit _arg2) <0x4208e890 + 0x002bc> in <filename unknown>:0 

  at Suave.Tests.Perf+perfTests@54-3.Invoke (Suave.Tests.SuavePerfHarness harness) <0x4208e830 + 0x00033> in <filename unknown>:0 

  at <StartupCode$PerfUtil>.$Benchmark.f@1-1[State] (Microsoft.FSharp.Core.FSharpFunc`2 testF, <StartupCode$PerfUtil>.State state, Int32 repeat, Boolean catchExceptions, Boolean warmup, System.String testId, System.String sessionId, Microsoft.FSharp.Core.Unit unitVar0) <0x4207c340 + 0x0038e> in <filename unknown>:0 

---> (Inner Exception #0) System.ObjectDisposedException: Cannot access a disposed object.

Object name: 'System.Net.Sockets.NetworkStream'.

  at System.Net.WebConnectionStream.EndWrite (IAsyncResult r) <0x4206a5c0 + 0x0039f> in <filename unknown>:0 

  at System.IO.Stream.<BeginEndWriteAsync>m__8 (System.IO.Stream stream, IAsyncResult asyncResult) <0x7fe12756b7d0 + 0x0001b> in <filename unknown>:0 

  at (wrapper delegate-invoke) System.Func`3[System.IO.Stream,System.IAsyncResult,System.Threading.Tasks.VoidTaskResult]:invoke_TResult_T1_T2 (System.IO.Stream,System.IAsyncResult)

  at System.Threading.Tasks.TaskFactory`1+FromAsyncTrimPromise`1[TResult,TInstance].Complete (TInstance thisRef, System.Func`3 endMethod, IAsyncResult asyncResult, Boolean requiresSynchronization) <0x7fe127899ca0 + 0x00064> 25524 in <filename unknown>:0 

--- End of stack trace from previous location where exception was thrown ---

  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x7fe1275a62a0 + 0x00029> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x7fe1275a4170 + 0x000a7> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x7fe1275a40f0 + 0x0006b> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x7fe1275a40a0 + 0x0003a> in <filename unknown>:0 

  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () <0x7fe1275a46e0 + 0x00012> in <filename unknown>:0 

  at System.Net.Http.HttpClientHandler+<SendAsync>c__async0.MoveNext () <0x41eecbd0 + 0x00fb8> in <filename unknown>:0 

--- End of stack trace from previous location where exception was thrown ---

  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x7fe1275a62a0 + 0x00029> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x7fe1275a4170 + 0x000a7> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x7fe1275a40f0 + 0x0006b> in <filename unknown>:0 

  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x7fe1275a40a0 + 0x0003a> in <filename unknown>:0 

  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () <0x7fe1275a48e0 + 0x00017> in <filename unknown>:0 

  at System.Net.Http.HttpClient+<SendAsyncWorker>c__async0.MoveNext () <0x41eeb510 + 0x0049f> in <filename unknown>:0 <---

 (00:00:01.3639842)

217 tests run: 216 passed, 1 ignored, 0 failed, 1 errored (00:00:06.1981398)

Ping @ademar FYI; the tests are now "mostly" passing in my PR #481

[haf]

Fixed in latest "weekly"