From 2cf4da0ea11f5746eb7ae4dfd775f757576e4d98 Mon Sep 17 00:00:00 2001
From: David Neil <davidneil@lucidchart.com>
Date: Wed, 28 Jan 2026 17:30:19 -0700
Subject: [PATCH] fix(core): hold constructors weakly in DepsTracker cache

Otherwise a component can be held in memory longer than
the component constructor is reachable from application code.

(cherry picked from commit cab5ddd526f5a6ba44b042ba0391f0526877cde6)
---
 packages/core/src/render3/deps_tracker/deps_tracker.ts | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/packages/core/src/render3/deps_tracker/deps_tracker.ts b/packages/core/src/render3/deps_tracker/deps_tracker.ts
index 73d0ded223e..5fe97a6a431 100644
--- a/packages/core/src/render3/deps_tracker/deps_tracker.ts
+++ b/packages/core/src/render3/deps_tracker/deps_tracker.ts
@@ -31,10 +31,13 @@ import {
  * An implementation of DepsTrackerApi which will be used for JIT and local compilation.
  */
 class DepsTracker implements DepsTrackerApi {
-  private ownerNgModule = new Map<ComponentType<any>, NgModuleType<any>>();
+  private ownerNgModule = new WeakMap<ComponentType<any>, NgModuleType<any>>();
   private ngModulesWithSomeUnresolvedDecls = new Set<NgModuleType<any>>();
-  private ngModulesScopeCache = new Map<NgModuleType<any>, NgModuleScope>();
-  private standaloneComponentsScopeCache = new Map<ComponentType<any>, StandaloneComponentScope>();
+  private ngModulesScopeCache = new WeakMap<NgModuleType<any>, NgModuleScope>();
+  private standaloneComponentsScopeCache = new WeakMap<
+    ComponentType<any>,
+    StandaloneComponentScope
+  >();
 
   /**
    * Attempts to resolve ng module's forward ref declarations as much as possible and add them to