From 1161edfa335bf56265e1f4ed17d8d61ab81cd56a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tinjo=20Sch=C3=B6ni?=
 <32767367+tscni@users.noreply.github.com>
Date: Tue, 20 Jun 2023 00:13:13 +0200
Subject: [PATCH] Invalidate cached methods when referenced files are deleted

---
 src/Psalm/Internal/Codebase/Analyzer.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/Psalm/Internal/Codebase/Analyzer.php b/src/Psalm/Internal/Codebase/Analyzer.php
index 6378e484770..ba0209ea6f2 100644
--- a/src/Psalm/Internal/Codebase/Analyzer.php
+++ b/src/Psalm/Internal/Codebase/Analyzer.php
@@ -687,6 +687,16 @@ public function loadCachedResults(ProjectAnalyzer $project_analyzer): void
             }
         }
 
+        // This could be optimized by storing method references to files
+        foreach ($file_reference_provider->getDeletedReferencedFiles() as $deleted_file) {
+            foreach ($file_reference_provider->getFilesReferencingFile($deleted_file) as $file_referencing_deleted) {
+                $methods_referencing_deleted = $this->analyzed_methods[$file_referencing_deleted] ?? [];
+                foreach ($methods_referencing_deleted as $method_referencing_deleted => $_) {
+                    $newly_invalidated_methods[$method_referencing_deleted] = true;
+                }
+            }
+        }
+
         foreach ($newly_invalidated_methods as $method_id => $_) {
             foreach ($method_references_to_class_members as $i => $_) {
                 unset($method_references_to_class_members[$i][$method_id]);