▶ OK /html/semantics/embedded-content/the-img-element/relevant-mutations.html
  │   ▶ FAIL [expected PASS] inserted/removed children of img
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] picture is removed; img has src
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] picture is removed; img has srcset
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] picture is removed; img has previous sibling source
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] picture is removed; img has following sibling source
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] parent is picture, following img inserted
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] parent is picture, following img removed
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] parent is picture, following img has src set
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] parent is picture, following img has srcset set
  │   │   → assert_unreached: update the image data was run Reached unreachable code
  │   │ FAIL [expected PASS] parent is picture, following img has sizes set
  └   └   → assert_unreached: update the image data was run Reached unreachable code