[DeadCode] Handle Infinite recursion on self referenced trait on PHPStanNodeScopeResolver

Author: samsonasik

rules-tests/DeadCode/Rector/ClassMethod/RemoveUnusedPrivateMethodRector/Fixture/skip_trait_recursive.php.inc

@@ -0,0 +1,19 @@
+<?php
+
+namespace Rector\Tests\DeadCode\Rector\ClassMethod\RemoveUnusedPrivateMethodRector\Fixture;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Rector\Tests\DeadCode\Rector\ClassMethod\RemoveUnusedPrivateMethodRector\Source\RecursiveTrait;
+
+/**
+ * @method static Builder<static>|BaseModel query()
+ */
+class BaseModel extends Model {
+    use RecursiveTrait;
+
+    public function parent(): BelongsTo {
+        return $this->belongsTo(self::class);
+    }
+}

rules-tests/DeadCode/Rector/ClassMethod/RemoveUnusedPrivateMethodRector/Source/RecursiveTrait.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\DeadCode\Rector\ClassMethod\RemoveUnusedPrivateMethodRector\Source;
+
+trait RecursiveTrait {
+    public function getRecursive(): object {
+        return new class () {
+            use RecursiveTrait;
+        };
+    }
+}

src/NodeTypeResolver/PHPStan/Scope/PHPStanNodeScopeResolver.php

@@ -477,6 +477,14 @@ private function nodeScopeResolverProcessNodes(
             // in the middle of process
             // fallback to fill by found scope
             RectorNodeScopeResolver::processNodes($stmts, $mutatingScope);
+        } catch (Error $error) {
+            if (! str_contains($error->getMessage(), 'Infinite recursion?')) {
+                throw $error;
+            }
+
+            // handle stack overflow from recursive structures (e.g. self-referencing traits)
+            // fallback to fill by found scope
+            RectorNodeScopeResolver::processNodes($stmts, $mutatingScope);
         }
     }