permissions are sorted by title but with the wrong comparison operator

I'm assuming this is a bug -- this part of the code has no documentation: 🐛 PermissionHandler class docs to specify how permissions are sorted Active .

failed cases indentified Deprecated NULL placeholder value for key (%type_name), would refine more on it.
until the issue is not resolved, https://www.drupal.org/project/drupal/issues/3350482 🐛 PermissionHandler class docs to specify how permissions are sorted Active can't be moved.

@joachim I am using php 8.1, I tried a basic test and I don't get the same result as you described:

$permissions = [
  'use bar in specific way alpha',
  'use foo in another specific way',
  'use foo',
  'use bar in specific way beta',
  'use bar',
];

uasort($permissions, function ($perm1, $perm2) {
  return $perm1 <=> $perm2;
});

var_dump($permissions);

It gives

array(5) {
  [4]=>
  string(7) "use bar"
  [0]=>
  string(29) "use bar in specific way alpha"
  [3]=>
  string(28) "use bar in specific way beta"
  [2]=>
  string(7) "use foo"
  [1]=>
  string(31) "use foo in another specific way"
}

Am I right saying that it is the expected result?

Yeah, so am I with that snippet.... something else must be going on then!

Just spotted this on a customer site with inconsistent capitalisation, a content type with initials "R P" was sorted before a content type with initials "R a"

However this also looks to be a duplicate of #2804947: Permissions page order is incorrect → which solves this problem and another related one, closing as duplicate.