[Webkit-unassigned] [Bug 180397] New: WebDriver: imported/w3c/webdriver/tests/contexts/json_serialize_windowproxy.py fails

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180397

            Bug ID: 180397
           Summary: WebDriver:
                    imported/w3c/webdriver/tests/contexts/json_serialize_w
                    indowproxy.py fails
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebDriver
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cgarcia at igalia.com
                CC: bburg at apple.com

All subtests are failing with the same error:

self = <webdriver.client.Session object at 0x7f7284747a50>, method = 'POST', url = 'session/2566af01-1686-4126-b8e9-59ffb880ccac/execute/sync'
body = {'args': [], 'script': 'return window;'}

    def send_command(self, method, url, body=None):
        """
            Send a command to the remote end and validate its success.

            :param method: HTTP method to use in request.
            :param uri: "Command part" of the HTTP request URL,
                e.g. `window/rect`.
            :param body: Optional body of the HTTP request.

            :return: `None` if the HTTP response body was empty, otherwise
                the `value` field returned after parsing the response
                body as JSON.

            :raises ValueError: If the response body does not contain a
                `value` key.
            :raises error.WebDriverException: If the remote end returns
                an error.
            """
        response = self.transport.send(
            method, url, body,
            encoder=protocol.Encoder, decoder=protocol.Decoder,
            session=self)

        if response.status != 200:
>           raise error.from_response(response)
E           JavascriptErrorException: javascript error (500): JSON.stringify cannot serialize cyclic structures.

body       = {'args': [], 'script': 'return window;'}
method     = 'POST'
response   = <Response status=500 error=<JavascriptErrorException http_status=500>>
self       = <webdriver.client.Session object at 0x7f7284747a50>
url        = 'session/2566af01-1686-4126-b8e9-59ffb880ccac/execute/sync'

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