Ticket #51686: fake_update.4.diff

src/wp-admin/includes/class-core-upgrader.php

@@ -153 +153 @@
                         return $working_dir;
                 }
 
+/*
                 // Copy update-core.php from the new version into place.
                 if ( ! $wp_filesystem->copy( $working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true ) ) {
                         $wp_filesystem->delete( $working_dir, true );
@@ -160 +161 @@
                         return new WP_Error( 'copy_failed_for_update_core_file', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), 'wp-admin/includes/update-core.php' );
                 }
                 $wp_filesystem->chmod( $wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE );
+*/
 
                 wp_opcache_invalidate( ABSPATH . 'wp-admin/includes/update-core.php' );
                 require_once ABSPATH . 'wp-admin/includes/update-core.php';

src/wp-admin/includes/update-core.php

@@ -946 +946 @@
         }
 
         $wp_filesystem->chmod( $versions_file, FS_CHMOD_FILE );
+
+        /*
+         * `wp_opcache_invalidate()` only exists in WordPress 5.5 or later,
+         * so don't run it when upgrading from older versions.
+         */
+        if ( function_exists( 'wp_opcache_invalidate' ) ) {
+                wp_opcache_invalidate( $versions_file );
+        }
+
         require WP_CONTENT_DIR . '/upgrade/version-current.php';
         $wp_filesystem->delete( $versions_file );
 
@@ -1117 +1126 @@
                         $result = new WP_Error( 'copy_failed_for_version_file', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), 'wp-includes/version.php' );
                 }
                 $wp_filesystem->chmod( $to . 'wp-includes/version.php', FS_CHMOD_FILE );
+
+                /*
+                 * `wp_opcache_invalidate()` only exists in WordPress 5.5 or later,
+                 * so don't run it when upgrading from older versions.
+                 */
+                if ( function_exists( 'wp_opcache_invalidate' ) ) {
+                        wp_opcache_invalidate( $to . 'wp-includes/version.php' );
+                }
         }
 
         // Check to make sure everything copied correctly, ignoring the contents of wp-content.

src/wp-includes/version.php

@@ -13 +13 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-alpha-50427-src';
+$wp_version = '5.5-alpha-50427-src';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

tools/local-env/php-config.ini

@@ -1 +1 @@
 upload_max_filesize = 1G
 post_max_size = 1G
+opcache.enable = 1
+opcache.validate_timestamps = 0