DrupalPractice.CodeAnalysis.VariableAnalysis.UnusedVariable gives a false positive for the $uri variable in the following example:

\Drupal::httpClient()->get($input, [ 'on_stats' => function (TransferStats $stats) use (&$uri) { $uri = $stats->getEffectiveUri(); }, ]); 

Another false positive occurs for the following code snippet which modifies an array by reference:

 80 | WARNING | Unused variable $entry. | | (DrupalPractice.CodeAnalysis.VariableAnalysis.UnusedVariable) 

foreach ($derivatives as &$entry) { $entry += $base_plugin_definition; } 

The sniff doesn't detect that the $uri variable is actually in use since it is passed by reference to the anonymous function.

Originally posted in https://www.drupal.org/project/coder/issues/3065679.