dart2js: missing toString() method in error/exception object in IE9

[DartBot]

This issue was originally filed by @bp74

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What steps will reproduce the problem?

import('dart:html');

void main() {
  AudioContext audioContext;
  
  try {
    audioContext = new AudioContext();
  }
  catch(final error) {
    print(error);
  }
}

What is the expected output? What do you see instead?

This issue came up after issue #3190 was fixed. Before the fix the catch-block wasn't called at all, after the bug was fixed the error object in the sample above leads to another problem.

The "print(error)" statement tries to convert the "error" variable to a String. In Firefox the result is "Instance of 'TypeError'" which is fine. In IE9 you get a JavaScript error:

SCRIPT5007: Unable to get value of the property 'charCodeAt$1': object is null or undefined

I have attached 3 pictures showing the call stack.

What version of the product are you using? On what operating system?

Dart Editor Build 7992 32 bit, Windows 7 64 bit.

[DartBot]

This comment was originally written by @bp74

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I need more sleep, here are the pictures ...

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Attachments:
shot1.png (54.43 KB)
shot2.png (55.90 KB)
shot3.png (52.78 KB)

[peter-ahe-google]

cc @kasperl.
Added Area-Dart2JS, Triaged labels.

[kasperl]

Set owner to @kasperl.
Added Accepted label.

[kasperl]

Removed Priority-Medium label.
Added Priority-High label.

[kasperl]

Possible fix submitted in r8332. I'll keep this bug open until I've added a (passing) regression test case.

[kasperl]

I modified the kind of exception being thrown in r8417. On IE it now prints:

  Exception: Object doesn't support this action

and on Firefox it now prints:

  Exception: constructor is not a constructor

Still needs a regression test.

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Removed Priority-High label.
Added Priority-Medium label.

[kasperl]

Added this to the Later milestone.

[kasperl]

Removed this from the Later milestone.

[kasperl]

Added this to the M2 milestone.

[peter-ahe-google]

Set owner to @johnniwinther.

[johnniwinther]

Removed this from the M2 milestone.
Added this to the M3 milestone.

[kasperl]

Peter, does your work in https://codereview.chromium.org/11973018/ solve this issue?

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Set owner to @peter-ahe-google.
Changed the title to: "dart2js: missing toString() method in error/exception object in IE9".

[peter-ahe-google]

I don't know. I haven't tested on IE9 yet. I'll make a note to test this as well in CL 11973018.

[peter-ahe-google]

Removed this from the M3 milestone.
Added this to the M4 milestone.

[kasperl]

Removed this from the M4 milestone.
Added this to the M5 milestone.

[kasperl]

Added TriageForM5 label.

[kasperl]

Bumping to Milestone-Later.

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Removed this from the M5 milestone.
Added this to the Later milestone.
Removed TriageForM5 label.

[peter-ahe-google]

The error that occurs is due to this JavaScript code:

    audioContext0 = new (window.AudioContext || window.webkitAudioContext)();

Which is equivalent to:

    var x = void 0;
    audioContext0 = new (x)();

This is covered by CL 11973018 which I have revived today.

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Added Started label.

[peter-ahe-google]

Fixed in r25262.

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Added Fixed label.