[DX] Make sure provided node types are children of node

src/Console/Command/ProcessCommand.php

@@ -201,6 +201,7 @@ final class ProcessCommand extends AbstractCommand
         $this->configuration->setAreAnyPhpRectorsLoaded((bool) $this->rectorNodeTraverser->getPhpRectorCount());
 
         $this->rectorGuard->ensureSomeRectorsAreRegistered();
+        $this->rectorGuard->ensureGetNodeTypesAreNodes();
         $this->stubLoader->loadStubs();
 
         $source = $this->resolvesSourcePaths($input);

src/Exception/Rector/InvalidRectorException.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Exception\Rector;
+
+use Exception;
+
+final class InvalidRectorException extends Exception
+{
+}

src/Guard/RectorGuard.php

@@ -4,7 +4,9 @@ declare(strict_types=1);
 
 namespace Rector\Guard;
 
+use PhpParser\Node;
 use Rector\Exception\NoRectorsLoadedException;
+use Rector\Exception\Rector\InvalidRectorException;
 use Rector\FileSystemRector\FileSystemFileProcessor;
 use Rector\PhpParser\NodeTraverser\RectorNodeTraverser;
 
@@ -45,4 +47,22 @@ final class RectorGuard
             PHP_EOL
         ));
     }
+
+    public function ensureGetNodeTypesAreNodes(): void
+    {
+        foreach ($this->rectorNodeTraverser->getAllPhpRectors() as $phpRector) {
+            foreach ($phpRector->getNodeTypes() as $nodeTypeClass) {
+                if (is_a($nodeTypeClass, Node::class, true)) {
+                    continue;
+                }
+
+                throw new InvalidRectorException(sprintf(
+                    'Method "%s::getNodeTypes() provides invalid node class "%s". It must be child of "%s"',
+                    get_class($phpRector),
+                    $nodeTypeClass,
+                    Node::class
+                ));
+            }
+        }
+    }
 }