From effc468f993657919b896ebd8b1a52beff9450b3 Mon Sep 17 00:00:00 2001
From: Pavel Yaskevich <pyaskevich@apple.com>
Date: Tue, 4 Mar 2025 14:46:17 -0800
Subject: [PATCH] [CSSolver] Properly record opened pack expansion types

This bug leads to accumulation of data in the constraint
system even though most of it is out of scope.
---
 lib/Sema/TypeOfReference.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Sema/TypeOfReference.cpp b/lib/Sema/TypeOfReference.cpp
index 03d7ed2b35fe4..e2ddfd69bb4d1 100644
--- a/lib/Sema/TypeOfReference.cpp
+++ b/lib/Sema/TypeOfReference.cpp
@@ -318,7 +318,7 @@ Type ConstraintSystem::openPackExpansionType(PackExpansionType *expansion,
                                            expansionVar, openedPackExpansion,
                                            expansionLoc));
 
-  OpenedPackExpansionTypes[openedPackExpansion] = expansionVar;
+  recordOpenedPackExpansionType(openedPackExpansion, expansionVar);
   return expansionVar;
 }