Git clone causes an "SSL error: syscall failure:" with a specific repo

Start with the failing clone path in Core/Proxy.cs:278 and Repository.cs:824, then inspect the error checks in Core/Ensure.cs:154 and :172. Reproduce, if possible, on Alpine Linux with .NET 8 using the reported private repository and authentication setup. Done means identifying the cause and making the clone succeed or reporting a more actionable error.

We are going to have to dump this library for this issue and move to using the cli instead. I figured I'd report this issue so maybe in the future someone can get around to fixing it. The issues has been reported before and have been open for over 4 years.

With a specific private repo, this error happens only on Alpine Linux in a container running as an ACA Job in Azure.
Authentication is being used (Personal Access Token) with the user of "default"

"[Message] SSL error: syscall failure: "

No other logging or error message.

Reproduction steps

This is extremely difficult to reproduce. I don't even know what it is about this specific repo that is causing the problem as other, repos owned by the same company using the same token, clone fine.

If I run locally in docker desktop, it does not crash. Everything else being equal.

I see others have reported the same issue and the bug has been open for years.

https://github.com/libgit2/libgit2sharp/issues/1262

Running the same user/token and URL from the cli git client works without issues.

git clone https:{user}:{token}@github.com/path/to/repo

I'm doing some digging to see if I can get more info about why it's happening.

I was able to get a detailed stacktrace from the service.

        [Exception]: [07/31/2024 23:56:31]: (/_/LibGit2Sharp/Core/Ensure.cs):(154)
        [Exception]: [07/31/2024 23:56:31]: (/_/LibGit2Sharp/Core/Ensure.cs):(172)
        [Exception]: [07/31/2024 23:56:31]: (/_/LibGit2Sharp/Core/Proxy.cs):(278)
        [Exception]: [07/31/2024 23:56:31]: (/_/LibGit2Sharp/Repository.cs):(824)

at LibGit2Sharp.Core.Proxy.git_clone(String url, String workdir, GitCloneOptions& opts) in //LibGit2Sharp/Core/Proxy.cs:line 278
at LibGit2Sharp.Repository.Clone(String sourceUrl, String workdirPath, CloneOptions options) in //LibGit2Sharp/Repository.cs:line 824

Here is some feedback. The logging isn't very good in this function that's checking the response code from the code repository. If we could see the code that is being returned (and it doesn't seem to the HTTP OK) then we would have a better understanding about what the issue is.

This morning (8/1/2024) I implemented a cli version of git and it had no issues cloning from the ACA Job on the specific repo.

Expected behavior

The repo clones

Actual behavior

The library crashes

Version of LibGit2Sharp (release number or SHA1)

0.30

Operating system(s) tested; .NET runtime tested

Alpine Linux .NET 8.0