{
    "status": "FAIL", 
    "group": "default", 
    "message": "assert_equals: It came from a sandboxed iframe expected \"null\" but got \"\"", 
    "stack": "onmessage</onmessage<@http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html:17:7\nTest.prototype.step@http://web-platform.test:8000/resources/testharness.js:1611:25\nTest.prototype.step_func_done/<@http://web-platform.test:8000/resources/testharness.js:1651:32\n", 
    "subtest": "Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used", 
    "test": "/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html", 
    "line": 131734, 
    "action": "test_result", 
    "expected": "TIMEOUT"
}
{
    "status": "OK", 
    "group": "default", 
    "message": null, 
    "stack": null, 
    "subtest": null, 
    "test": "/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html", 
    "line": 131735, 
    "action": "test_result", 
    "expected": "TIMEOUT"
}