Ticket #35480: 35480.3.patch

src/wp-includes/media.php

@@ -985 +985 @@
          */
         $image_meta = apply_filters( 'wp_calculate_image_srcset_meta', $image_meta, $size_array, $image_src, $attachment_id );
 
-        if ( empty( $image_meta['sizes'] ) || strlen( $image_meta['file'] ) < 4 ) {
+        if ( empty( $image_meta['sizes'] ) || ( ! isset( $image_meta['file'] ) ) || strlen( $image_meta['file'] ) < 4 ) {
                 return false;
         }
 

tests/phpunit/tests/media.php

@@ -1184 +1184 @@
                 $this->assertFalse( wp_calculate_image_srcset( $size_array, $image_src, $image_meta2 ) );
 
                 // File name is incorrect
+                $image_meta3 = $image_meta;
+                $image_meta3['file'] = '/';
+                $this->assertFalse( wp_calculate_image_srcset( $size_array, $image_src, $image_meta3 ) );
+
+                // File name is incorrect
                 $image_meta4 = $image_meta;
-                $image_meta4['file'] = '/';
+                unset( $image_meta4['file'] );
                 $this->assertFalse( wp_calculate_image_srcset( $size_array, $image_src, $image_meta4 ) );
 
                 // Intermediate size is string instead of array.
-                $image_meta3 = $image_meta;
-                $image_meta3['sizes']['medium_large'] = '';
+                $image_meta5 = $image_meta;
+                $image_meta5['sizes']['medium_large'] = '';
                 unset( $srcset[768] );
                 $expected_srcset = implode( ', ', $srcset );
-                $this->assertSame( $expected_srcset, wp_calculate_image_srcset( $size_array, $image_src, $image_meta3 ) );
+                $this->assertSame( $expected_srcset, wp_calculate_image_srcset( $size_array, $image_src, $image_meta5 ) );
         }
 
         /**