From 56467f798c61a908e61ce52db431aa90b9037856 Mon Sep 17 00:00:00 2001
From: Marian <42134098+IanDelMar@users.noreply.github.com>
Date: Mon, 2 Feb 2026 03:20:47 +0100
Subject: [PATCH] Ensure `WP_Theme::$template` is not null

---
 src/wp-includes/class-wp-theme.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/wp-includes/class-wp-theme.php b/src/wp-includes/class-wp-theme.php
index a6966351f185f..da591e7def500 100644
--- a/src/wp-includes/class-wp-theme.php
+++ b/src/wp-includes/class-wp-theme.php
@@ -361,7 +361,7 @@ public function __construct( $theme_dir, $theme_root, $_child = null ) {
 		}
 
 		if ( ! $this->template && $this->stylesheet === $this->headers['Template'] ) {
-			$this->errors = new WP_Error(
+			$this->errors   = new WP_Error(
 				'theme_child_invalid',
 				sprintf(
 					/* translators: %s: Template. */
@@ -369,6 +369,7 @@ public function __construct( $theme_dir, $theme_root, $_child = null ) {
 					'<code>Template</code>'
 				)
 			);
+			$this->template = $this->stylesheet;
 			$this->cache_add(
 				'theme',
 				array(
@@ -377,6 +378,7 @@ public function __construct( $theme_dir, $theme_root, $_child = null ) {
 					'headers'                => $this->headers,
 					'errors'                 => $this->errors,
 					'stylesheet'             => $this->stylesheet,
+					'template'               => $this->template,
 				)
 			);