Fix

src/Psalm/Internal/PhpVisitor/Reflector/FunctionLikeNodeScanner.php

@@ -126,8 +126,7 @@ public function start(
         PhpParser\Node\FunctionLike $stmt,
         bool $fake_method = false,
         PhpParser\Comment\Doc $doc_comment = null
-    )
-    {
+    ) {
         if ($stmt instanceof PhpParser\Node\Expr\Closure
             || $stmt instanceof PhpParser\Node\Expr\ArrowFunction
         ) {

src/Psalm/Plugin/EventHandler/Event/AddRemoveTaintsEvent.php

@@ -2,25 +2,28 @@
 
 namespace Psalm\Plugin\EventHandler\Event;
 
+use PhpParser\Node\ArrayItem;
 use PhpParser\Node\Expr;
 use Psalm\Codebase;
 use Psalm\Context;
 use Psalm\StatementsSource;
 
 final class AddRemoveTaintsEvent
 {
-    private Expr $expr;
+    /** @var ArrayItem|Expr */
+    private $expr;
     private Context $context;
     private StatementsSource $statements_source;
     private Codebase $codebase;
 
     /**
      * Called after an expression has been checked
      *
+     * @param ArrayItem|Expr $expr
      * @internal
      */
     public function __construct(
-        Expr $expr,
+        $expr,
         Context $context,
         StatementsSource $statements_source,
         Codebase $codebase
@@ -31,7 +34,10 @@ public function __construct(
         $this->codebase = $codebase;
     }
 
-    public function getExpr(): Expr
+    /**
+     * @return ArrayItem|Expr
+     */
+    public function getExpr()
     {
         return $this->expr;
     }

tests/fixtures/SuicidalAutoloader/autoloader.php

@@ -18,6 +18,7 @@
         'PHPUnit\Framework\DOMElement',
         'Stringable',
         'AllowDynamicProperties',
+        'PhpParser\Node\Stmt\Throw', // BCHelper for nikic/php-parser v4/5
 
         // https://github.com/symfony/symfony/pull/40203
         // these are actually functions, referenced as `if (!function_exists(u::class))`