From ec48c8305c40fbafbab51801f93bb4e4b6a25ea0 Mon Sep 17 00:00:00 2001
From: Edu <eduhmc@users.noreply.github.com>
Date: Wed, 2 Sep 2026 00:19:21 +0000
Subject: [PATCH] fix(core): return null when getDirectiveMetadata is called
 with null or undefined

Safely return null instead of throwing an unhandled TypeError when getDirectiveMetadata is called with a falsy directive or component instance.

(cherry picked from commit cea6896a0fef4fa4f37a4c7a43c7a880900eb21d)
---
 packages/core/src/render3/util/discovery_utils.ts    | 3 +++
 packages/core/test/acceptance/discover_utils_spec.ts | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/packages/core/src/render3/util/discovery_utils.ts b/packages/core/src/render3/util/discovery_utils.ts
index ac03e0ede91..37d630042cb 100644
--- a/packages/core/src/render3/util/discovery_utils.ts
+++ b/packages/core/src/render3/util/discovery_utils.ts
@@ -304,6 +304,9 @@ export type DirectiveDebugMetadata =
 export function getDirectiveMetadata(
   directiveOrComponentInstance: any,
 ): AngularComponentDebugMetadata | AngularDirectiveDebugMetadata | null {
+  if (!directiveOrComponentInstance) {
+    return null;
+  }
   const {constructor} = directiveOrComponentInstance;
   if (!constructor) {
     throw new Error('Unable to find the instance constructor');
diff --git a/packages/core/test/acceptance/discover_utils_spec.ts b/packages/core/test/acceptance/discover_utils_spec.ts
index b5b58bdf4ec..921d44d4e7d 100644
--- a/packages/core/test/acceptance/discover_utils_spec.ts
+++ b/packages/core/test/acceptance/discover_utils_spec.ts
@@ -405,6 +405,11 @@ describe('discovery utils', () => {
       expect(metadata!.inputs).toEqual({a: 'b'});
       expect(metadata!.outputs).toEqual({c: 'd'});
     });
+
+    it('should return null when passed null or undefined', () => {
+      expect(getDirectiveMetadata(null)).toBeNull();
+      expect(getDirectiveMetadata(undefined)).toBeNull();
+    });
   });
 });