Ticket #38686: 38686.2.diff

src/wp-includes/post.php

@@ -815 +815 @@
                 $args->label = $post_status;
 
         if ( false === $args->label_count )
-                $args->label_count = array( $args->label, $args->label );
+                $args->label_count = _n_noop( $args->label, $args->label );
 
         $wp_post_statuses[$post_status] = $args;
 

tests/phpunit/tests/admin/includesListTable.php

@@ -237 +237 @@
 
                 $this->assertNotContains( 'id="cat"', $output );
         }
+
+        /**
+         * @ticket 38686
+         */
+        function test_label_count_fallback_no_notices() {
+                create_initial_post_types();
+                register_post_status( 'foo', [
+                        'label'                     => 'Foo',
+                        'show_in_admin_status_list' => true,
+                ] );
+
+                $p = self::factory()->post->create_and_get( array(
+                        'post_type'  => 'post',
+                        'post_status' => 'foo'
+                ) );
+
+                $this->table->screen->post_status = 'foo';
+
+                ob_start();
+                $this->table->get_views();
+                $output = ob_get_clean();
+
+                $this->assertNotContains( 'Undefined index', $output );
+        }
 }