PHPLoc task Wrong class name for XML Logger class

[arruor]

composer.json:

"require-dev": {
        "phploc/phploc": "^4.0",
        "phing/phing": "^2.16"
    },

task definition:

<target name="phploc" unless="phploc.done"
            description="Measure project size using PHPLOC and print human readable output">
        <phploc countTests="true">
            <fileset refid="phpFiles"/>
            <formatter type="cli" outfile="build/html/phploc.txt"/>
            <formatter type="cli" outfile="build/logs/phploc.txt"/>
            <formatter type="xml" outfile="build/logs/phploc.xml"/>
            <formatter type="csv" outfile="build/logs/phploc.csv"/>
        </phploc>
        <property name="phploc.done" value="true"/>
    </target>

Stack trace

[phploc] Writing report to: ./build/logs/phploc.xml
PHP Fatal error:  Uncaught Error: Class '\SebastianBergmann\PHPLOC\Log\XML' not found in /path/to/project/vendor/phing/phing/classes/phing/tasks/ext/phploc/PHPLocXMLFormatter.php:34
Stack trace:
#0 /path/to/project/vendor/phing/phing/classes/phing/tasks/ext/phploc/PHPLocTask.php(310): PHPLocXMLFormatter->printResult(Array, true)
#1 /path/to/project/vendor/phing/phing/classes/phing/tasks/ext/phploc/PHPLocTask.php(219): PHPLocTask->runPhpLocCheck()
#2 /path/to/project/vendor/phing/phing/classes/phing/UnknownElement.php(100): PHPLocTask->main()
#3 /path/to/project/vendor/phing/phing/classes/phing/Task.php(283): UnknownElement->main()
#4 /path/to/project/vendor/phing/phing/classes/phing/Target.php(336): Task->perform()
#5 /path/to/project/vendor/phing/phing/classes/phing/Target.php(366): Target->main()
#6 /path/to/project/vendor/phing/phing/classes/phing/Project.php(898): T in /path/to/project/vendor/phing/phing/classes/phing/tasks/ext/phploc/PHPLocXMLFormatter.php on line 34

Fatal error: Uncaught Error: Class '\SebastianBergmann\PHPLOC\Log\XML' not found in /path/to/project/vendor/phing/phing/classes/phing/tasks/ext/phploc/PHPLocXMLFormatter.php on line 34

Error: Class '\SebastianBergmann\PHPLOC\Log\XML' not found in /path/to/project/vendor/phing/phing/classes/phing/tasks/ext/phploc/PHPLocXMLFormatter.php on line 34

Call Stack:
    0.0002     361688   1. {main}() /path/to/project/vendor/phing/phing/bin/phing:0
    0.0005     376432   2. require_once() /path/to/project/vendor/phing/phing/bin/phing:14
    0.0295    5202592   3. Phing::fire() /path/to/project/vendor/phing/phing/bin/phing.php:58
    0.0295    5202592   4. Phing::start() /path/to/project/vendor/phing/phing/classes/phing/Phing.php:347
    0.0304    5305728   5. Phing->runBuild() /path/to/project/vendor/phing/phing/classes/phing/Phing.php:200
    0.0866   12227416   6. Project->executeTargets() /path/to/project/vendor/phing/phing/classes/phing/Phing.php:723
    0.0866   12227416   7. Project->executeTarget() /path/to/project/vendor/phing/phing/classes/phing/Project.php:868
    0.0868   12228776   8. Target->performTasks() /path/to/project/vendor/phing/phing/classes/phing/Project.php:898
    0.0868   12228776   9. Target->main() /path/to/project/vendor/phing/phing/classes/phing/Target.php:366
    0.0868   12228776  10. UnknownElement->perform() /path/to/project/vendor/phing/phing/classes/phing/Target.php:336
    0.0874   12242624  11. UnknownElement->main() /path/to/project/vendor/phing/phing/classes/phing/Task.php:283
    0.0874   12242624  12. PHPLocTask->main() /path/to/project/vendor/phing/phing/classes/phing/UnknownElement.php:100
    0.9398   16203656  13. PHPLocTask->runPhpLocCheck() /path/to/project/vendor/phing/phing/classes/phing/tasks/ext/phploc/PHPLocTask.php:219
    1.0629   17931040  14. PHPLocXMLFormatter->printResult() /path/to/project/vendor/phing/phing/classes/phing/tasks/ext/phploc/PHPLocTask.php:310