Web Worker: Workers loaded from using window.URLCreateObjectURL importScripts hang

Issue #4754087 • Assigned to Steve B.

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Details

Created
Sep 28, 2015
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This issue is public.
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Steps to reproduce

URL:

Repro Steps:

Execute the Following script (also located in the attachment) in IE and view the console output.
See that the last logged line is "calling importScipts(‘Fake_Url_XYZ.js’)", and the worker blocks at the

importScripts(‘Fake_Url_XYZ.js’);

statement and never continues\throws the expected exception

    var scriptContent =
        "console.log('Worker loaded');\r\n" +
        "\r\n" +
        "try {\r\n" +
        "   console.log(\"calling importScipts('Fake_Url_XYZ.js')\");\r\n" +

        "   // This line hangs in I.E. It should throw an exception\r\n" +
        "   importScripts('Fake_Url_XYZ.js');\r\n" + // This line hangs in I.E. It should throw an exception

        "   console.log(\"successfully imported 'Fake_Url_XYZ.js'. THIS SHOIULD NEVER HAPPEN\");\r\n" +
        "} catch (e) {\r\n" +
        "   console.log(\"error in importScipts('Fake_Url_XYZ.js'). THIS IS EXPECTED\");\r\n" +
        "}\r\n" +
        "\r\n" +
        "console.log(\"Finished loading worker\");\r\n";
    var blob = new Blob([scriptContent], { type: 'text/javascript' });
    var url = window.URL.createObjectURL(blob);
    var worker = new Worker(url);

Expected Results:

The browser should throw an exception.

Actual Results:

Dev Channel specific:

No

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    Comments and activity

    • Microsoft Edge Team

      OSG V. Sep 28, 2015 2015-09-28T16:25:14.717Z

      Changed Assigned To to “Kamen M.”

      OSG V. Sep 29, 2015 2015-09-29T02:25:15.867Z

      Changed Assigned To to “Rico M.”

      Brandon H. Sep 30, 2015 2015-09-30T16:20:43.56Z

      Changed Assigned To from “Rico M.” to “IE S.”

      Brandon H. Sep 30, 2015 2015-09-30T16:20:43.56Z

      Changed Status to “Won’t fix”

      Louis S. Sep 30, 2015 2015-09-30T18:58:48.2Z

      Changed Assigned To from “IE S.” to “Brandon H.”

      Louis S. Sep 30, 2015 2015-09-30T18:58:48.2Z

      Changed Status from “Won’t fix”

      Brandon H. Oct 2, 2015 2015-10-02T17:34:51.887Z

      Changed Title from “Web Workers loaded from using window.URLCreateObjectURL importScripts hang” to “Web Workers loaded from using window.URLCreateObjectURL importScripts hang”

      Brandon H. Oct 2, 2015 2015-10-02T17:34:51.887Z

      Changed Assigned To from “Brandon H.” to “Justin R.”

      Brandon H. Oct 2, 2015 2015-10-02T17:34:51.887Z

      Changed Status to “Confirmed”

      Justin R. Oct 7, 2015 2015-10-07T00:07:58.333Z

      Changed Title from “Web Workers loaded from using window.URLCreateObjectURL importScripts hang” to “BAR CHECK: Web Workers loaded from using window.URLCreateObjectURL importScripts hang”

      Brandon H. Aug 23, 2016 2016-08-23T16:47:33.093Z

      Changed Assigned To from “Justin R.” to “Daniel L.”

      Rob H. Nov 9, 2016 2016-11-09T17:42:02.797Z

      Changed Assigned To from “Daniel L.” to “Venkat K.”

      Rob H. Nov 9, 2016 2016-11-09T17:42:02.797Z

      Changed Status from “Confirmed”

      Venkat K. Nov 9, 2016 2016-11-09T22:26:43.66Z

      Changed Assigned To from “Venkat K.” to “Steve B.”

      Steve B. Jan 17, 2017 2017-01-17T07:49:02.96Z

      Changed Title from “BAR CHECK: Web Workers loaded from using window.URLCreateObjectURL importScripts hang” to “Web Worker: Workers loaded from using window.URLCreateObjectURL importScripts hang”

      Louis S. Mar 16, 2017 2017-03-16T19:48:26.253Z

      Changed Assigned To from “Steve B.” to “James M.”

      Louis S. Mar 16, 2017 2017-03-16T19:58:51.047Z

      Changed Assigned To from “James M.” to “Steve B.”

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