The path special property is undefined in a probe. For example:

Probes.PathProbe {
    id: megaProbe
    searchPaths: {
        console.error(path)  // undefined
        return FileInfo.joinPaths(path, 'some/path')
    }
    names: 'project.qbs'
}

Expected behavior

Special properties like

• base
• filePath
• path
• and maybe even project (UPD: this seems to work actually)

have proper values and are not undefined.