Scan freezes when scanning SharpVectors-1.8.2 library

[pddurr]

Description

I downloaded the package from GitHub to a local directory.

I run the scan several times with several excludes and -n -1, -n 1 and -n 2 option E:\scancode-toolkit-v32.0.8\scancode -clpeui -v -n -1 --ignore ".java", --ignore ".settings" --ignore ".csproj" --ignore ".Designer.cs" --ignore "*.resx" --json-pp e:\Libraries\SharpVectors-1.8.2.json e:\Libraries\SharpVectors-1.8.2\Source

Scan feezes when scanning an assembly.cs file or another cs file

How To Reproduce

Download SharpVectors-1.8.2 library from https://github.com/ElinamLLC/SharpVectors

Scan with: E:\scancode-toolkit-v32.0.8\scancode -clpeui -v -n -1 --ignore ".java", --ignore ".settings" --ignore ".csproj" --ignore ".Designer.cs" --ignore "*.resx" --json-pp e:\Libraries\SharpVectors-1.8.2.json e:\Libraries\SharpVectors-1.8.2\Source

System configuration

Win 10 Scancode-Toolkit 32.0.8

[pombredanne]

Thanks for the report. This is most bizarre but a bug alright.

[pombredanne]

There is something bizarre about the repo is that is contains pre-built binaries too. And is therefore rather large (120MB) for a single NuGet, but this should not be an issue Which version of Python do you use?

[pddurr]

Python 3.11.3150.0 is installed

[pombredanne]

The data array in https://raw.githubusercontent.com/ElinamLLC/SharpVectors/master/Source/SharpVectorModel/Compressions/Brotli/Dictionary.cs looks really suspicious FWIW or at least weird. @paulushub would you know why this is this way?

[paulushub]

@pombredanne That is the implementation provided by the Google engineers, and the reason is well documented. See the comments: https://github.com/google/brotli/blob/master/csharp/org/brotli/dec/Dictionary.cs