Ignore script tags listed in plural rules (why are even there?)

Author: mlocati

bin/import-cldr-data

@@ -390,11 +390,23 @@ class Plurals extends Processor
             'root' => '',
         );
         $unrecognizedLocaleCodes = array();
+        $m = null;
         foreach ($xPluralRulesList as $xPluralRules) {
             $locales = preg_split('/\s+/', (string) $xPluralRules->getAttribute('locales'), -1, PREG_SPLIT_NO_EMPTY);
             if ($locales === array()) {
                 throw new RuntimeException('No locales found in pluralRules element');
             }
+            $localesWithScript = array();
+            foreach ($locales as $locale) {
+                if (preg_match('/^([a-z]{2,3})[_\-][A-Z][a-z]{3}$/', $locale, $m)) {
+                    $localesWithScript[$locale] = $m[1];
+                }
+            }
+            $missingLocales = array_diff($localesWithScript, $locales);
+            if ($missingLocales !== array()) {
+                throw new RuntimeException("Found locales with script without matching locales without script:-\n" . implode("\n- ", $missingLocales));
+            }
+            $locales = array_diff($locales, array_keys($localesWithScript));
             $elements = array(
                 'pluralRule-count-zero' => null,
                 'pluralRule-count-one' => null,