From 9af8a9ac384d38fe69dbc839d1505aff8d4af460 Mon Sep 17 00:00:00 2001
From: Matthew Brown <github@muglug.com>
Date: Fri, 27 Sep 2019 12:58:32 -0400
Subject: [PATCH] Fix #2181 - prevent class template types being wiped by
 anonymous class use

---
 .../Internal/Visitor/ReflectorVisitor.php     |  4 +++-
 tests/Template/ClassTemplateTest.php          | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/Psalm/Internal/Visitor/ReflectorVisitor.php b/src/Psalm/Internal/Visitor/ReflectorVisitor.php
index 91f1cd8a8..7a57cd48a 100644
--- a/src/Psalm/Internal/Visitor/ReflectorVisitor.php
+++ b/src/Psalm/Internal/Visitor/ReflectorVisitor.php
@@ -632,7 +632,9 @@ class ReflectorVisitor extends PhpParser\NodeVisitorAbstract implements PhpParse
                 $this->file_storage->has_docblock_issues = true;
             }
 
-            $this->class_template_types = [];
+            if ($node->name) {
+                $this->class_template_types = [];
+            }
 
             if ($this->after_classlike_check_plugins) {
                 $file_manipulations = [];
diff --git a/tests/Template/ClassTemplateTest.php b/tests/Template/ClassTemplateTest.php
index d47ae796b..dc772f298 100644
--- a/tests/Template/ClassTemplateTest.php
+++ b/tests/Template/ClassTemplateTest.php
@@ -1703,6 +1703,25 @@ class ClassTemplateTest extends TestCase
                         }
                     }',
             ],
+            'anonymousClassMustNotBreakParentTemplate' => [
+                '<?php
+                    /** @template T */
+                    class Foo {
+                        /** @psalm-var ?T */
+                        private $value;
+
+                        /** @psalm-param T $val */
+                        public function set($val) : void {
+                            $this->value = $val;
+                            new class extends Foo {};
+                        }
+
+                        /** @psalm-return ?T */
+                        public function get() {
+                            return $this->value;
+                        }
+                    }'
+            ],
         ];
     }