Step over crashes tab in Dartium

[sethladd]

This simple code:

import('dart:html');

void main() {
  ButtonElement button = new Element.tag('button');

  button.text = 'Click me';
  button.classes.add('important');

  button.on.click.add((e) => window.alert('Clicked!!'));

  document.body.elements.add(button);
}

Open Dev Tools. Click Sources. Select the Dart file. Set breakpoint on line 5 (button.text = 'Click me';) Reload page. Program stops on line 6 (yay!) Click Step over in script debugger in Dev Tools. Tab crash. (boo :(

Dartium:

Chromium 21.0.1156.0 (Developer Build 139395)
OS Mac OS X
WebKit 537.1 (Source/WebCore/Configurations@567)
JavaScript V8 3.11.7
DartVM r8116
Flash 11.2.202.235
User Agent Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1156.0 (Dart) Safari/537.1
Command Line /Users/sethladd/Downloads/dart 2/dart-sdk/Chromium.app/Contents/MacOS/Chromium --remote-debugging-port=9322 --user-data-dir=/Users/sethladd/.dartiumSettings --bwsi --no-first-run --no-default-browser-check --no-process-singleton-dialog --flag-switches-begin --flag-switches-end about:blank
Executable Path /Users/sethladd/Downloads/dart 2/dart-sdk/Chromium.app/Contents/MacOS/Chromium
Profile Path /Users/sethladd/.dartiumSettings/Default

[sethladd]

Apologies, instructions should read "Set breakpoint on line 6"

[DartBot]

This comment was originally written by @mhausner

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Set owner to @mhausner.
Added Accepted label.

[DartBot]

This comment was originally written by @mhausner

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Do you happen to have a stack trace of the crash by any chance?

[sethladd]

How do I retrieve the stack trace?

[DartBot]

This comment was originally written by [email protected]

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I would start with Debug build on Linux and watch for stdout/stderr output.

[sethladd]

I'm sorry, I don't have a Linux machine to test this on. I have just tried again and I can repro it.

@hausner, let me know if I can stop by tomorrow and show this to you.

[DartBot]

This comment was originally written by [email protected]

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Added this to the M1 milestone.
Removed Area-Dartium label.
Added Area-VM label.

[sethladd]

Just tested without the editor involved. I started Dartium directly and I was able to repro the crash.

[DartBot]

This comment was originally written by @mhausner

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Pavel just closed the very similar issue #3299, says he cannot reproduce it after my change from yesterday. Maybe this issue got fixed as well?

[DartBot]

This comment was originally written by @mhausner

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Can you still repro this Seth?

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Added NeedsInfo label.

[DartBot]

This comment was originally written by @mhausner

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I managed to run this code in a Dartium build from yesterday. I was able to step over every line without a crash. Whatever the original cause for the crash was that Seth reported, it seems to be fixed.

[DartBot]

This comment was originally written by @mhausner

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Added Fixed label.