Description:
------------
When I call Locale::lookup as follows, I get the expected result 'en-US':
Locale::lookup(['en', 'en-US'], 'en-US-u-cu-EUR-tz-deber-fw-mon', false);

I should get the same result when using the canonicalize option, because following the docs all "arguments will be converted to canonical form before matching" and after conversion, they should still match - but I get 'en' instead of the expected locale 'en-US':
Locale::lookup(['en', 'en-US'], 'en-US-u-cu-EUR-tz-deber-fw-mon', true);

I also get 'en' when using the canonicalized versions directly (no matter if the
canonicalize option is set or not):
echo Locale::lookup(['en', 'en_US'], 'en_US@currency=eur;fw=mon;timezone=Europe/Berlin', false) . PHP_EOL;
echo Locale::lookup(['en', 'en_US'], 'en_US@currency=eur;fw=mon;timezone=Europe/Berlin', true) . PHP_EOL;

Test script:
---------------
<?php
echo Locale::lookup(['en', 'en-US'], 'en-US-u-cu-EUR-tz-deber-fw-mon', false) . PHP_EOL;
echo PHP_EOL;
echo Locale::canonicalize('en-US-u-cu-EUR-tz-deber-fw-mon') . PHP_EOL;
echo Locale::canonicalize('en-US') . PHP_EOL;
echo Locale::canonicalize('en') . PHP_EOL;
echo PHP_EOL;
echo Locale::lookup(['en', 'en-US'], 'en-US-u-cu-EUR-tz-deber-fw-mon', true) . PHP_EOL;
echo Locale::lookup(['en', 'en_US'], 'en_US@currency=eur;fw=mon;timezone=Europe/Berlin', false) . PHP_EOL;
echo Locale::lookup(['en', 'en_US'], 'en_US@currency=eur;fw=mon;timezone=Europe/Berlin', true) . PHP_EOL;

Expected result:
----------------
en-US

en_US@currency=eur;fw=mon;timezone=Europe/Berlin
en_US
en

en-US
en_US
en_US

Actual result:
--------------
en-US

en_US@currency=eur;fw=mon;timezone=Europe/Berlin
en_US
en

en
en
en