Failing to read huge pack files

I'm using lib2gitsharp with big enterprise repositories which may have pack files with a size of 4 to 5 GB. When the size of the initially cloned pack file exceeds a certain value, reading operations will fail. I started with a 4.5 GB pack file repo, which I updated incrementally for some months. This poses no problems. When I freshly clone the same repo now, the initial pack file has (due to ongoing development) grown to 5.5 GB, which lib2gitsharp cannot handle any more.

Reproduction steps

Connect to a repository with pack files of size between 4.5 GB (working) and 5.56 GB (failing).
Iterate the commits of a branch or call a Diff.Compare on two Trees.

Expected behavior

Iterating the commit collection or comparing two trees works without exception.

Actual behavior

A LibGit2SharpException exception is thrown:

LibGit2Sharp.LibGit2SharpException
HResult=0x80131500
Message=invalid pack file - delta offset is zero
Source=LibGit2Sharp
StackTrace:
at LibGit2Sharp.Core.Ensure.HandleError(Int32 result) in C:\projects\libgit2sharp\LibGit2Sharp\Core\Ensure.cs:line 154

Version of LibGit2Sharp (release number or SHA1)

0.26.2

Operating system(s) tested; .NET runtime tested

Win 10, .NET Framework 4.8

首先，使用包含 5.56 GB pack 文件的 repository 重现该失败，然后检查 LibGit2Sharp/Core/Ensure.cs:154 的异常路径。将 commit 迭代和 Diff.Compare 的行为与 4.5 GB 的正常工作情况进行比较；当两个操作都能在不出现无效 pack 文件异常的情况下完成时，即表示完成。