[Intl] Prevent infinite loops #31564
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It is possible that
locale_parse($locale)returns an empty array under some circumstances (I can observe this on my machine but I'm not clear on why). In this scenariolocale_compose($localeSubTags)will returnfalseinstead of the expectednull(the expected return values arestring|nullwithstringcarrying on the locale lookup andnullbreaking it). This results in an infinite loop on my machine at least.