| <!doctype HTML> | |
| <!-- Test passes if it does not crash. --> | |
| <body style="opacity:0.5"> | |
| <div style=" -webkit-mask-box-image-source: url();" > | |
| </div> | |
| <div style="box-shadow: 1px 1px black; padding-block-start: 1px; isolation: isolate"> | |
| <div style="isolation: isolate"></div> | |
| </body> |