I parsed the classroom.blend from the blender-benchmark. This file is created on windows and uses relative paths. These relative paths on linux are completed using pathlib. in linux a '\' is a valid char to use in a filename.
INFO:blender_asset_tracer.trace.result:Resolving //textures\radiator_AO.png rel to /home/jeroen/blender-benchmark-1.0b2-linux-glibc219-x86_64/scenes/classroom/assets/radiator/radiator.blend → /home/jeroen/blender-benchmark-1.0b2-linux-glibc219-x86_64/scenes/classroom/assets/radiator/textures\radiator_AO.pngWARNING: blender_asset_tracer.pack:Missing file: /home/jeroen/blender-benchmark-1.0b2-linux-glibc219-x86_64/scenes/classroom/assets/radiator/textures\radiator_AO.png
Blender can't find the file as pathlib tries to find a file called textures\radiator_AO.png in folder /home/jeroen/blender-benchmark-1.0b2-linux-glibc219-x86_64/scenes/classroom/assets/radiator/.
According to blender BLI_Path we should convert the OS platform we are running on as slash and backslash are both invalid to be used in file and foldernames.
My proposal is to adapt the BlendPath.to_path method to convert the Windows slashes automatically to posix slashes.