SystemIndexOutOfRangeException in HuffmanTree.Build

[mfriedrich74]

I am trying to extract a file inside a wim nested in an ISO file.
This is the file inside a Windows 10 installation media: sources\install.wim\1\Windows\Boot\EFI\bootmgfw.efi

I am using an UdfReader to get the DiscFileInfo (wimFile) of sources\install.wim.
Then running:

            using (Stream wimStream = wimFile.OpenRead())
            {
                WimFile wim = new WimFile(wimStream);
                WimFileSystem wfs = wim.GetImage(0); // zero indexed
                DiscFileInfo bootefi = wfs.GetFileInfo("Windows\\Boot\\EFI\\bootmgfw.efi");
                ...
            };

wim.GetImage throws a SystemIndexOutOfRangeException within ReadSecurityDescriptors.

Am I doing something wrong?

I am using DiscUtils tag v0.16.14 - target framework 4.5.2.

[mfriedrich74]

In HuffmanTree.Build:
_buffer[position + n] = symbol; (line 88) throws the exception.
position is 32768.

[mfriedrich74]

If that matters, the install.wim file size is > 4GB.

[LTRData]

I have not been able to reproduce this. With which Windows image (version etc) did you get this exception?