Stable unexpected results (1): 
  ▶ OK /html/webappapis/user-prompts/print-during-unload.html
  │   ▶ FAIL [expected PASS] print() during unload
  │   │   → assert_array_equals: expected property 1 to be "destination" but got "error: window.print is not a function" (expected array ["start", "destination"] got ["start", "error: window.print is not a function"])
  │   │ 
  │   │ @http://web-platform.test:8000/html/webappapis/user-prompts/print-during-unload.html:24:26
  │   │ Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2638:25
  └   └ Test.prototype.step_func/<@http://web-platform.test:8000/resources/testharness.js:2685:35