Deprecated function: strnatcasecmp(): Passing null to parameter #2 ($string2) of type string is deprecated in Drupal\Core\Language\Language::Drupal\Core\Language\{closure}() (line 161 of /app/docroot/core/lib/Drupal/Core/Language/Language.php)
When using PHP 8.1 this warning appears in the watchdog logs..
It happens in this function in /core/lib/Drupal/Core/Language/Language.php
/**
* Sort language objects.
*
* @param \Drupal\Core\Language\LanguageInterface[] $languages
* The array of language objects keyed by langcode.
*/
public static function sort(&$languages) {
uasort($languages, function (LanguageInterface $a, LanguageInterface $b) {
$a_weight = $a->getWeight();
$b_weight = $b->getWeight();
if ($a_weight == $b_weight) {
$a_name = $a->getName();
$b_name = $b->getName();
// If either name is a TranslatableMarkup object it can not be converted
// to a string. This is because translation requires a sorted list of
// languages thereby causing an infinite loop. Determine the order based
// on ID if this is the case.
if ($a_name instanceof TranslatableMarkup || $b_name instanceof TranslatableMarkup) {
$a_name = $a->getId();
$b_name = $b->getId();
}
return strnatcasecmp((string) $a_name, (string) $b_name);
}
return $a_weight <=> $b_weight;
});
}
The "strnatcasecmp" function is expecting strings to be passed as parameters, and it will throw this warning when the parameters are NULL.
Cast the parameters passed to strnatcasecmp to string.
Postponed: needs info
11.0 🔥
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
What is the root cause of a language that cannot produce a name for itself?
Are those reproduction steps from installing a "clean" Drupal instance?
I have reverted to a previous database and the problem stop.