At runtime: “The type initializer for ‘LibGit2Sharp.Core.NativeMethods’ threw an exception

[verxion]

Reproduction steps

Run “Package-Install LibGit2Sharp” once in a solution with only one project and once in a solution with multiple projects. Using “LibGit2Sharp.Repository.Clone” works fine from the single project solution, but fails in the multiproject solution with above error (in title of this issue).

Expected behavior

Expect them to both work

Actual behavior

Multiproject solution gives following error at runtime: “The type initializer for ‘LibGit2Sharp.Core.NativeMethods’ threw an exception”

Version of LibGit2Sharp (release number or SHA1)

0.25.0 (same issue was present on 0.24.0 at least)

Operating system(s) tested; .NET runtime tested

Windows 7, 4.6.1 (doesn’t work), .NET Core 2.0 (works)

Note that I initially created a Stack Overflow question for this, available here: https://stackoverflow.com/questions/50355388/the-type-initializer-for-libgit2sharp-core-nativemethods-threw-an-exception?noredirect=1#comment87728615_50355388

[bording]

Can you provide a repro sample of the solution structure that you're having the problem with?

[verxion]

I cannot due to the solution having some 70 individual projects, all of which have proprietary code in them.

[bording]

@verxion I'm not asking for your actual project, but can you create a simplified version that mimics the same project structure and see if you have the same problem? If you do, then you can provide that here, and I can help you out.

Otherwise, I'm just guessing as to what the problem might be!

[verxion]

Looks to me like I’m having the same issue as this: #1521

Problem is, his posted solution isn’t working for me - if I add the dependentAssembly section he solved the issue with to my app.config, I continue to get my same error.

I can look at making a simplified version, but I figured in the meantime I could show you this is actually a pre-existing issue already reported by others...

[bording]

@verxion What is the full stack trace of the error you're getting? Does it include

System.IO.FileLoadException: Could not load file or assembly 'System.Runtime.InteropServices.RuntimeInformation, Version=0.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies.

If not, then you're not having the same problem.

[verxion]

Ok, no, I don’t have the “Could not load file or assembly” message.

I made a sample 37 line program and set it up in 4.6.1 framework console app... it works without issue. I continue to believe it isn’t the code (these 37 lines are IDENTICAL to the code in the multi-project solution), there is something about the project configuration that is giving me this problem, and I cannot begin to tell you how frustrated I am about this. I’ve tried SO MANY things (manually adding references, trying to add bindingRedirects, even installed “System.Runtime.InteropServices.RuntimeInformation” using NuGet, to no avail). :(

What I actually get, which to me is very confusing, is the following (using Assembly Binding Log Viewer to obtain):

1. It gives a “Post-policy reference” for RuntimeInformation specifying “Version=0.0.0.0”

2. It says it successfully downloads the assembly (System.Runtime.InteropServices.RuntimeInformation.dll)

3. It logs the assembly name with “Version=4.0.2.0” (note that the NuGet install grabbed version 4.0.3.0....)

4. It gives an error saying “The assembly reference did not match the assembly definition found”

As just some additional information, it appears that LibGit2Sharp.dll references this dll, so I’d really like to better understand how to provide it what it needs in a way that it can USE it. :(

Thanks for any help you can provide - I really and truly appreciate your help.

[bording]

What is the full stack trace of your error?

[verxion]

It doesn’t look like it would be very helpful, but here you go:

.........UpdateGitHub() Line 1632
.........MainControl.GitHub() Line 1559
.........MainController(bool auto) Line 224
.........Main(string[] args) Line 43

[bording]

That isn't a stack trace. I'm looking for the actual, entire, text of the StackTrace property of the exception that's being thrown.

I see that you've posted on #1521, but as I've stated before, if you aren't seeing the FileLoadException error that mentions System.Runtime.InteropServices.RuntimeInformation, that that isn't your problem.

I really would like to help you, but you're making it incredibly difficult to do that. At this point you've provided almost no information, and you haven't provided a sample to demonstrate the problem.

You say you created a console app. Did you mimic the entire project structure from your actual solution when you did that? If not, then that's what you should do to try to isolate the problem. You need to have all of the project references and package references the same as in your actual solution.

While you're working on that, please provide answers to all of the following questions:

• What is the full stack trace text of the exception you're seeing?
• What framework are you targeting in your solution?
• What project format are you using: Is it the new SDK-style projects, or the original, legacy project format?
• How are you referencing NuGet packages in your solution: packages.config or project references?
• For the actual project that you're seeing the exception in, what type of application is it? Console app, ASP.NET, ASP.NET Core, etc.
• When you look at the bin folder of that project, you should see a Libgit2Sharp.dll and a lib folder that contains various OS subfolders that have a libgit2.dll. Do you have that?

[verxion]

Bording: Again - THANK YOU for your help. I’m NOT trying to make this incredibly difficult.

Please see this post telling how to get a stack trace from Visual Studio (that I referenced before responding to you earlier): https://stackoverflow.com/questions/945193/how-do-i-find-the-stack-trace-in-visual-studio

Also, please note that the system on which I’m having trouble is air gapped, so getting you this information is inordinately more difficult than you likely realized. :( (And yes, I realize none of that matters if you don’t have the information to help me - I just wanted you to understand)

This solution has dozens of projects in it, each of which itself has dozens of references. I wish there was a better way to isolate what part of it is causing the issue. :( I’ll work through duplicating all the projects, references and package references, but that is a multi day activity...

Here is the text of stacktrace property of the exception being thrown (transcribed from airgapped system, so please bear with me in case of typos):

StackTrace “ at LibGit2Sharp.Core.NativeMethods.git_clone(git_repository*& repo, String origin_url, FilePath workdir_path, GitCloneOptions& opts) at LibGit2Sharp.Core.Proxy.git_clone)String url, String workdir, GitCloneOptions& opts) at LibGit2Sharp.Repository.Clone(String sourceUrl, String workdirPath, CloneOptions options at ....UpdateGitHub() in C:\Projects\........MainControl.cs: line 1616” string

Solution is targeting 4.6.1 (as is my sample project)

Legacy project format

I did a simple NuGet console installation of “LibGit2Sharp”, which I see has placed entries referencing package I’d “LibGit2Sharp” in packages.config throughout the solution. Please note that in addition to the installation, I also went to “Manage NuGet Packages for Solution...” in the Tools menu and installed LibGit2Sharp (and LibGit2Sharp.NativeBinaries) to every project in the solution using the GUI there. That said, I have tried (and since removed) adding manually created references to “System.Runtime.InteropServices.RuntimeInformation.dll”, I’ve even tried installing the System.Runtime.InteropServices.RuntimeInformation NuGet package, to no avail.

The actual project I’m seeing the exception in is a Console app.

The bin folder for this project does NOT contain LibGit2Sharp.dll. Instead, the Libraries folder has the dll, and the packages/LibGit2Sharp.0.25.0/lib/netstandard2.0 folder has it as well.

Finally, transcribing, here is the short block of the relevant code (please realize this isn’t final code - I’ve changed it hundreds of times trying to test different possibilities of why things aren’t working):

string ourRepoPath = @“C:\SomePath”;
string baseGitHubURL = “https://github.ourcompany.com”;
var ghe = new Uri(baseGitHubURL + “api/vow/orgs/“ + ourOrg);
var client = new OctoKit.GitHubClient(new ProductHeaderValue(“SomeClient”), ghe;
var fo = new FetchOptions
{
  CredentialsProvider = (_url, _user, _cred) => new UsernamePasswordCredentials { Username = “h2jg23k2j4hg424gkhj2g4kjhg23424jhg”, Password = string.Empty }
};
var ourRepoList = client.Repository.GetAllForOrg(ourOrg).Result;
foreach (var ourRepo in ourRepoList)
{
  try
    {
      if (!Directory.Exists(ourRepoPath + @“\” + ourRepo.Name))
      {
        Directory.CreateDirectory(ourRepoPath + @“\” + ourRepo.Name);
        var co = new CloneOptions
        {
          CredentialsProvider = (_url, _user, _cred) => new UserNamePasswordCredentials { Username = “h2jg23k2j4hg424gkhj2g4kjhg23424jhg”, Password = string.Empty }
          };
          // THIS IS THE LINE GIVING THE EXCEPTION:
          LibGit2Sharp.Repository.Clone {baseGitHubURL + ourOrg + “/“ + ourRepo.Name, ourRepoPath + @“\” @ ourRepo.Name, co);
        }
      }
      Catch (Exception e)
      {
        Console.WriteLine(e.Message + “ “ + DateTime.Now.ToString());
        Console.WriteLine(“Problem processing “ + ourRepo.Name);
      }
    }
  }
}

[bording]

The bin folder for this project does NOT contain LibGit2Sharp.dll. Instead, the Libraries folder has the dll, and the packages/LibGit2Sharp.0.25.0/lib/netstandard2.0 folder has it as well.

Can you explain this a bit more? What do you mean by a Libraries folder? Would it be possible to provide a complete list of the contents of your project's bin folder? Perhaps a screenshot?

[verxion]

For this particular solution, there is a “catch all” Library folder that, as best I can tell, all DLLs are copied into at build time. I say this because if I do a “Build->Clean”, the project (ie, not the third party ones) DLLs go away. Then a “Build->Build” brings them back with a timestamp from the moment of the build. This same directory has the LibGit2Sharp.dll, but the date is 2018-03-26 4:57am.

For the particular project within this solution that is having the exception, the bin folder has a “Release” folder inside (which is empty), and nothing else at all.

[bording]

Where is the .exe for the project located in all of this?

[verxion]

The exe for the project is located in the Libraries folder.

[bording]

Ok, so in this Libraries folder, I would expect to see

• project.exe
• LibGit2Sharp.dll
• LibGit2Sharp.dll.config
• LibGit2Sharp.pdb
• LibGit2Sharp.xml
• lib\linux\x86_64\libgit2-6311e88.so
• lib\osx\libgit2-6311e88.dylib
• lib\win32\x64\git2-6311e88.dll
• lib\win32\x64\git2-6311e88.pdb
• lib\win32\x86\git2-6311e88.dll
• lib\win32\x86\git2-6311e88.pdb

Are all of those files there?