F#Powerpack的元数据无法将FSharp.Core识别为F#库 [英] F# Powerpack's Metadata doesn't recognize FSharp.Core as an F# library

问题描述

这是我的测试代码，用于找出问题所在:

Here's my test code to isolate the problem:

open Microsoft.FSharp.Metadata
[<EntryPoint>]
let main args =
  let core = FSharpAssembly.FromFile @"C:\Program Files\FSharp-2.0.0.0\\bin\FSharp.Core.dll"
  let core2 = FSharpAssembly.FSharpLibrary
  let core3 = System.AppDomain.CurrentDomain.GetAssemblies() 
              |> Seq.find (fun a -> a.FullName.Contains "Core") 
              |> FSharpAssembly.FromAssembly

  core.Entities |> Seq.iter (printfn "%A")
  0

所有三个let应该都给我相同的FSharpAssembly.相反，所有这3个对象都会抛出一个异常，即FSharp.Core不是F#程序集(详细信息，请重新格式化以提高可读性).另外两个线索:

All three lets should give me the same FSharpAssembly. Instead, all 3 throw an exception that FSharp.Core is not an F# assembly (details below, re-formatted for readability). Two more clues:

1. 使用core3方法，对于测试F#程序集本身会得到相同的错误
2. 执行#r "@C:\Program Files...\FSharp.Powerpack.Metadata.dll"后，我在FSI上未收到错误消息.

1. Using the core3 method, I get the same error for the test F# assembly itself
2. I don't get the error at FSI after doing #r "@C:\Program Files...\FSharp.Powerpack.Metadata.dll".

有什么想法吗?我正在较旧的XP VM上使用Visual Studio 2008，F#2.0和F#Powerpack 2.0.0.0(2010年5月20日)发行，但我认为它已更新为SP3.

Any ideas? I'm using Visual Studio 2008, F# 2.0 and F# Powerpack 2.0.0.0 (May 20, 2010) release on an oldish XP VM, I think it's updated to SP3 though.

(今天早上我在使用Powerpack 1.9.9.9时遇到了错误，因此我升级到2.0.0.0.我认为，如果1.9.9.9无法识别F#的2.0.0.0的程序集，那么可能是在Powerpack 2.0中进行了错误修复. 0.0会有所帮助.)

(I got the error this morning with Powerpack 1.9.9.9, so I upgraded to 2.0.0.0. I thought that if 1.9.9.9 doesn't recognise F#'s 2.0.0.0's assemblies, then maybe bugfixes in Powerpack 2.0.0.0 would help.)

Unhandled Exception: System.TypeInitializationException: 
  The type initializer for 'Microsoft.FSharp.Metadata.AssemblyLoader' threw an
    exception. 
  ---> System.TypeInitializationException: The type initializer for
    '<StartupCode$FSharp-PowerPack-Metadata>.$Metadata' threw an exception. 
  ---> System.ArgumentException: could not produce an FSharpAssembly 
    object for the assembly 'FSharp.Core' because 
    this is not an F# assembly
Parameter name: name
   at Microsoft.FSharp.Metadata.AssemblyLoader.Add(String name,Assembly assembly)
   at <StartupCode$FSharp-PowerPack-Metadata>.$Metadata..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.FSharp.Metadata.AssemblyLoader..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.FSharp.Metadata.AssemblyLoader.Get(Assembly assembly)
   at Microsoft.FSharp.Metadata.FSharpAssembly.FromAssembly(Assembly assembly)
   at Program.main(String[] args) in 
     C:\Documents an...\FSMetadataTest\Program.fs:line 11
Press any key to continue . . .

推荐答案

内森(Nathan)，请仔细调查一下，该版本号实际上在2010年5月的原始发行版中并未更新，请参见workitem/4548"rel =" nofollow noreferrer> http://fsharppowerpack.codeplex.com/workitem/4548 我们已上传具有正确版本号的二进制文件.

Nathan, great investigation, the version number was indeed not updated in original May2010 release, see http://fsharppowerpack.codeplex.com/workitem/4548 We have uploaded binaries with corrected version number.

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