.NET Core 2.0.6 Method not found: 'System.Span`1<!!1> System.MemoryExtensions.NonPortableCast(System.Span`1<!!0>)'.

[ngoov]

Description

Using an ASP.NET Core 2.0.6 app, I'm getting a thumbnailphoto (bytes array) from our AD and using Image.Load(thumbnailPhoto) to load it in a variable. This produces the error:

"ClassName": "System.MissingMethodException",
    "Message": "Method not found: 'System.Span`1<!!1> System.MemoryExtensions.NonPortableCast(System.Span`1<!!0>)'.",
    "Data": null,
    "InnerException": null,
    "HelpURL": null,
    "StackTraceString": "   at SixLabors.ImageSharp.Memory.ArrayPoolMemoryManager.Buffer`1.get_Span()\r\n   at SixLabors.ImageSharp.Image.<>c__DisplayClass0_0.<InternalDetectFormat>b__0(IImageFormatDetector x)\r\n   at System.Linq.Enumerable.SelectEnumerableIterator`2.MoveNext()\r\n   at System.Linq.Enumerable.TryGetLast[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)\r\n   at SixLabors.ImageSharp.Image.InternalDetectFormat(Stream stream, Configuration config)\r\n   at SixLabors.ImageSharp.Image.DiscoverDecoder(Stream stream, Configuration config, IImageFormat& format)\r\n   at SixLabors.ImageSharp.Image.Decode[TPixel](Stream stream, Configuration config)\r\n   at SixLabors.ImageSharp.Image.WithSeekableStream[T](Configuration config, Stream stream, Func`2 action)\r\n   at SixLabors.ImageSharp.Image.Load[TPixel](Configuration config, Stream stream, IImageFormat& format)\r\n   at SixLabors.ImageSharp.Image.Load[TPixel](Configuration config, Byte[] data)\r\n   at SharePointApi.Controllers.AdController.CreateImageThumbnailWithImageSharp(Byte[] thumbnailPhoto, Int32 width, Int32 height) in F:\\dev\\SharePointApi\\SharePointApi\\Controllers\\AdController.cs:line 174\r\n   at SharePointApi.Controllers.AdController.<GetUsersInAdGroup>d__2.MoveNext() in F:\\dev\\SharePointApi\\SharePointApi\\Controllers\\AdController.cs:line 103",
    "RemoteStackTraceString": null,
    "RemoteStackIndex": 0,
    "ExceptionMethod": null,
    "HResult": -2146233069,
    "Source": "SixLabors.ImageSharp",
    "WatsonBuckets": null,
    "MMClassName": null,
    "MMMemberName": null,
    "MMSignature": null
}

It is working however in a .NET Framework 4.5.2 app using the SixLabors.ImageSharp version 1.0.0-beta0002 and SixLabors.Core version 1.0.0-beta0004

Steps to Reproduce

1. Get a byte array of the thumbnail from AD, saved in the variable: byte[] thumbnailPhoto
2. Saving the Image in a variable with: using (var image = Image.Load(thumbnailPhoto))
3. Entering the catch wiht the exception above

System Configuration

• ImageSharp version: tested both 1.0.0-beta0003 and 1.0.0-dev000956
• Other ImageSharp packages and versions:
• Environment (Operating system, version and so on): Windows 10 Enterprise
• .NET Framework version: Microsoft.NetCore.App: 2.0.6 and Microsoft.AspNetCore.All: 2.0.6
• Additional information:

[iamcarbon]

Are you able to check that your bin contains the System.Memory 4.5.0-preview1-26216-02 library?

Does your project contain any references to the old System.Memory library (4.4.0-preview1-25305-02)?

[ngoov]

@iamcarbon here are my dependencies of the project:

[JimBobSquarePants]

@nfdevil Well there's your problem.

The current System.Memory preview version we are depending on is the one on Nuget

System.Memory 4.5.0-preview1-26216-02

The version you have in your solution is from the Myget feed which must have breaking changes.

[ngoov]

Indeed, I've reverted my System.DirectoryServices.AccountManagement to 4.5.0-preview1-26216-02 and reinstalled the ImageSharp nuget. It works now, thanks!

[JimBobSquarePants]

Great! I'll close this off now then. Enjoy!

[xakep139]

@JimBobSquarePants I've got same exception on dotnet 2.1-preview2. Here's my .csproj file:

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Folder Include="wwwroot\" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.1.0-preview2-final" />
    <PackageReference Include="SixLabors.ImageSharp" Version="1.0.0-beta0003" />
  </ItemGroup>
</Project>

[xakep139]

In generated *.deps.json:

"SixLabors.ImageSharp/1.0.0-beta0003": {
  "dependencies": {
    "SixLabors.Core": "1.0.0-beta0005",
    "System.Buffers": "4.5.0-preview2-26406-04",
    "System.Memory": "4.5.0-preview2-26406-04",
    "System.Runtime.CompilerServices.Unsafe": "4.5.0-preview2-26406-04"
  },
  "compile": {
    "lib/netstandard2.0/SixLabors.ImageSharp.dll": {}
  }
}

[JimBobSquarePants]

@xakep139 beta3 targets the preview1 dependencies. There's breaking changes in preview2.

@iamcarbon submitted a PR updating to a couple of days ago so that is now in the nightlies.

[sebastienros]

What's the plan to move to preview2 ?

[JimBobSquarePants]

The nightlies already are

[sebastienros]

Well you are too fast for me, I found it and couldn't remove my comment in time :/

[JimBobSquarePants]

Haha. You caught me at a good time 😄

[HakanL]

Is there a milestone for when this will be supported via the main NuGet feed? Beta-0004?