System.InvalidOperationException

the exception call stack:
System.InvalidOperationException
HResult=0x80131509
Message=在已经完成任务后，尝试将任务转换为最终状态。
Source=mscorlib
StackTrace:
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetException(Exception exception)
at Renci.SshNet.Abstractions.SocketExtensions.d__1.MoveNext()
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(Object stateMachine)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
at Renci.SshNet.Abstractions.SocketExtensions.AwaitableSocketAsyncEventArgs.SetCompleted()
at Renci.SshNet.Abstractions.SocketExtensions.AwaitableSocketAsyncEventArgs.<.ctor>b__3_0(Object sender, SocketAsyncEventArgs e)
at System.Net.Sockets.SocketAsyncEventArgs.OnCompleted(SocketAsyncEventArgs e)
at System.Net.Sockets.SocketAsyncEventArgs.ExecutionCallback(Object ignored)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Net.Sockets.SocketAsyncEventArgs.FinishOperationAsyncFailure(SocketError socketError, Int32 bytesTransferred, SocketFlags flags)
at System.Net.Sockets.SocketAsyncEventArgs.CompletionPortCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)

Start by investigating Renci.SshNet.Abstractions.SocketExtensions.ConnectAsync and the AwaitableSocketAsyncEventArgs completion path shown in the stack trace. Reproduce the System.InvalidOperationException and determine the conditions that cause a task to be completed more than once; done should include a verified fix and a regression test, though the issue does not name a test file.