Ticket #37343: 37343.2.diff

src/wp-includes/post-template.php

@@ -1445 +1445 @@
 function wp_get_attachment_link( $id = 0, $size = 'thumbnail', $permalink = false, $icon = false, $text = false, $attr = '' ) {
         $_post = get_post( $id );
 
-        if ( empty( $_post ) || ( 'attachment' != $_post->post_type ) || ! $url = wp_get_attachment_url( $_post->ID ) )
+        if ( empty( $_post ) || ( 'attachment' !== $_post->post_type ) || ! $url = wp_get_attachment_url( $_post->ID ) ) {
                 return __( 'Missing Attachment' );
+        }
 
-        if ( $permalink )
+        if ( $permalink ) {
                 $url = get_attachment_link( $_post->ID );
+        }
 
         if ( $text ) {
                 $link_text = $text;
@@ -1459 +1461 @@
                 $link_text = '';
         }
 
-        if ( trim( $link_text ) == '' )
+        if ( '' === trim( $link_text ) ) {
                 $link_text = $_post->post_title;
+        }
 
+        if ( '' === trim( $link_text ) ) {
+                $link_text = esc_html( pathinfo( get_attached_file( $_post->ID ), PATHINFO_FILENAME ) );
+        }
         /**
          * Filters a retrieved attachment page link.
          *