Infinite loop in BundleEntryReader after updating php7.2-intl to 7.2.17 which installs libicu64

[megawilddaddy]

PHP 7.2.17-1+ubuntu18.04.1+deb.sury.org+3
SYMFONY: Symfony 4.2.4

locale_parse('root') now return an empty array as opposed to previos php versions which makes the Symfony\Component\Intl\Data\Bundle\Reader loop through fallback locales as

"en" => "root" => "" => "root" => "" and so on without it becoming null to break the loop

when reading from the regions because in the Symfony\Component\Intl\Locale::getFallback()
we never get inside the if (1 === \count($localeSubTags))

[ro0NL]

confirmed 👍 PR welcome i guess :)

[enricog84]

I just had the same issue after upgrading to php version 7.1.28 from 7.1.27.
Using latest symfony 3.4.24 fixed the issue. Imo the additional check in Location.php in the pull request #30781 fixed the issue.

[ro0NL]

So this is fixed in 4.2.5, @megawilddaddy can you try upgrading to see if it solves your issue as well?

[megawilddaddy]

Yes, upgrading to 4.2.5 fixed the issue.
Thanks guys!

[vkhramtsov]

@ro0NL Do we have any chance to get this fix for 2.8 version?

[jakzal]

@vkhramtsov no, 2.8 only receives security fixes at this point.

[vkhramtsov]

@jakzal I agree that it is not security fix, but this bug makes symfony completely unusable in some cases

[vkhramtsov]

@fabpot What do you think?

[vkhramtsov]

Anyway I've forked and fixed intl

[fabpot]

As @jakzal said, 2.8 is not maintained anymore, you should upgrade to 3.4 or downgrade PHP to a working version.

[vkhramtsov]

@fabpot Thank you for clarification

[alexander-schranz]

We had the same problem on some projects so we did overwrite the Locale.php class of the symfony/intl. The package is available under https://github.com/sulu/symfony-intl-fix. But I really would recommend to update to 3.4 and only use it as a temporary solution.

EDIT: See also @TomasVotruba comment if you want to use vendor patches composer plugin: #31089 (comment)

[TomasVotruba]

@alexander-schranz Thanks for sharing the solution 👏
We're just upgrading from Symfony 2.8 and this is one infinite loop blocker.

Note for similar legacy upgrades: exact commit that fixes it: symfony/intl@d2ac837
Then use vendor patches or similar to apply to your /vendor. Works like a charm 👍