Embedding F# Interactive throw System.Exception: 'Error creating evaluation session: StopProcessingExn None'

问题

I'm working through the Embedding F# Interactive example from here but like this post, I'm having an issue with the following line throwing an exception:

let fsiSession = FsiEvaluationSession.Create(fsiConfig, allArgs, inStream, outStream, errStream)

The exception thrown is:

"System.Exception: 'Error creating evaluation session: StopProcessingExn None'"

My project is being run from VS2017 Enterprise, setup as a simple F# console app, with the Target Framework as .NET Core 2.0. The version of FSharp.Compiler.Service downloaded from nuget is 17.0.1 and FSharp.Core is 4.2.0.

The Program.Fs file code I'm running is here (a direct port of the example):

open System
open System.IO
open System.Text
open Microsoft.FSharp.Compiler.Interactive.Shell

[<EntryPoint>]
let main argv =

    let sbOut = new StringBuilder()
    let sbErr = new StringBuilder()
    let inStream = new StringReader("")
    let outStream = new StringWriter(sbOut)
    let errStream = new StringWriter(sbErr)

    // Build command line arguments & start FSI session
    let argv = [| "C:\\Program Files (x86)\\Microsoft SDKs\\F#\\4.1\\Framework\\v4.0\\fsi.exe" |]
    let allArgs = Array.append argv [|"--noninteractive"|]

    let fsiConfig = FsiEvaluationSession.GetDefaultConfiguration()
    let fsiSession = FsiEvaluationSession.Create(fsiConfig, allArgs, inStream, outStream, errStream)

    /// Evaluate expression & return the result
    let evalExpression text =
        match fsiSession.EvalExpression(text) with
        | Some value -> printfn "%A" value.ReflectionValue
        | None -> printfn "Got no result!"

    evalExpression "42+1" // prints '43'

    Console.ReadLine() |> ignore

    0  // return integer

I already tried to add the files FSharp.Core.optdata and FSharp.Core.sigdata in my bin folder (bin\Debug\netcoreapp2.0) as mentioned here and here, but without success. By the way, my bin folder does not contain the file FSharp.Core.dll.

I also tried to publish my app and add the .optdata and .sigdata files manually in the publish folder, but without success either.

Any thoughts would be appreciated.

来源：https://stackoverflow.com/questions/48710880/embedding-f-interactive-throw-system-exception-error-creating-evaluation-sess

标签

.net-core

f#-interactive

.net-core-2.0