Filed by: aciure [at] mozilla.com https://treeherder.mozilla.org/logviewer.html#?job_id=204680958&repo=autoland https://queue.taskcluster.net/v1/task/Zgk_7GGFREmRAUeZtbtweQ/runs/0/artifacts/public/logs/live_backing.log 20:05:57 INFO - TEST-PASS | /webdriver/tests/fullscreen_window/user_prompts.py | test_accept_and_notify[capabilities0-confirm-True] 20:05:57 INFO - TEST-UNEXPECTED-FAIL | /webdriver/tests/fullscreen_window/user_prompts.py | test_accept_and_notify[capabilities0-prompt-] - UnknownErrorException: unknown error (500): Failed to decode response from marionette 20:05:57 INFO - check_user_prompt_closed_with_exception = <function check_user_prompt_closed_with_exception at 0x1116bf0c8> 20:05:57 INFO - dialog_type = 'prompt', retval = '' 20:05:57 INFO - 20:05:57 INFO - @pytest.mark.capabilities({"unhandledPromptBehavior": "accept and notify"}) 20:05:57 INFO - @pytest.mark.parametrize("dialog_type, retval", [ 20:05:57 INFO - ("alert", None), 20:05:57 INFO - ("confirm", True), 20:05:57 INFO - ("prompt", ""), 20:05:57 INFO - ]) 20:05:57 INFO - def test_accept_and_notify(check_user_prompt_closed_with_exception, dialog_type, retval): 20:05:57 INFO - > check_user_prompt_closed_with_exception(dialog_type, retval) 20:05:57 INFO - 20:05:57 INFO - check_user_prompt_closed_with_exception = <function check_user_prompt_closed_with_exception at 0x1116bf0c8> 20:05:57 INFO - dialog_type = 'prompt' 20:05:57 INFO - retval = '' 20:05:57 INFO - 20:05:57 INFO - tests/web-platform/tests/webdriver/tests/fullscreen_window/user_prompts.py:93: 20:05:57 INFO - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 20:05:57 INFO - tests/web-platform/tests/webdriver/tests/fullscreen_window/user_prompts.py:51: in check_user_prompt_closed_with_exception 20:05:57 INFO - assert_dialog_handled(session, expected_text=dialog_type, expected_retval=retval) 20:05:57 INFO - tests/web-platform/tests/webdriver/tests/support/asserts.py:75: in assert_dialog_handled 20:05:57 INFO - assert session.alert.text != expected_text, ( 20:05:57 INFO - tests/web-platform/tests/tools/webdriver/webdriver/client.py:20: in inner 20:05:57 INFO - return func(self, *args, **kwargs) 20:05:57 INFO - tests/web-platform/tests/tools/webdriver/webdriver/client.py:354: in text 20:05:57 INFO - return self.session.send_session_command("GET", "alert/text") 20:05:57 INFO - tests/web-platform/tests/tools/webdriver/webdriver/client.py:509: in send_session_command 20:05:57 INFO - return self.send_command(method, url, body)

Very strange log output: > 20:05:32 INFO - PID 869 | 1539227132348 webdriver::server DEBUG -> GET /session/82a876e9-bbc0-4947-8616-204f2f7cfaa3/alert/text > 20:05:32 INFO - PID 869 | 1539227132566 webdriver::server DEBUG Deleting session > 20:05:32 INFO - PID 869 | ** Unknown exception behavior: -2147483647 > 20:05:32 INFO - PID 869 | [GFX1-]: Receive IPC close with reason=AbnormalShutdown > 20:05:32 INFO - PID 869 | ** Unknown exception behavior: -2147483647 > 20:05:32 INFO - PID 869 | ** Unknown exception behavior: -2147483647 > 20:05:32 INFO - PID 869 | 1539227132668 geckodriver::marionette DEBUG Browser process stopped: exit code: 1 > 20:05:32 INFO - PID 869 | 1539227132674 webdriver::server DEBUG <- 500 Internal Server Error {"value":{"error":"unknown error","message":"Failed to decode response from marionette","stacktrace":""}} We send the `WebDriver:GetAlertText` command and the session gets deleted. I assume there was a crash of Firefox. Sadly we don't see those details yet due to bug 1490906.

Moving bug to Remote Protocol::Marionette component per bug 1815831.