Locale::getFallback returns false instead of null and infinite loop begins

[vytsci]

Symfony version(s) affected: 3.x, 4.x

Description
Due to update in php-intl library this loop is infinite.

symfony/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php

Line 81 in 95932df

while (null !== $currentLocale) {

How to reproduce
Update php-intl to the latest version and try to get country names for en locale for example.

Possible Solution
For BC it would be great to loop until locale is empty so check could be !empty($currentlocale)

Additional context
Ive been struggling with this all morning, later I had to code on my laptop and this error was not present, Ive updated php-intl and error became present as on my work PC.

[ro0NL]

duplicate of #31089?

[vytsci]

Yep sorry, I think so. Problem is Im using 3.x and Im unable to upgrade atm.

[jakzal]

@vytsci the fix is present in the 3.4 branch.

[vytsci]

@jakzal yes Ive already found it. ty