Web Audio API AudioContext crashes tab in Dartium

[sethladd]

Chromium 20.0.1124.0 (Developer Build 134875)

Following code:

import('dart:html');

main() {

  AudioContext audioContext = new AudioContext();

}

will crash a tab in Dartium

[DartBot]

This comment was originally written by [email protected]

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Seth,

that works fine on Linux with the most recent build.

I know we may have some troubles on Windows, but any way, what's your platform?

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Set owner to [email protected].
Added NeedsInfo label.

[sethladd]

Apologies for forgetting to include platform. I am on Mac 10.6.8.

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Added Triaged label.

[DartBot]

This comment was originally written by [email protected]

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also happening to me, using this version of dartium:

Chromium 20.0.1121.0 (Developer Build 134442)
OS Linux
WebKit 536.10 (Source/WebCore/Configurations@466)
JavaScript V8 3.10.6
DartVM r7221
Flash 11.2 r202
User Agent Mozilla/5.0 (X11; Linux i686) AppleWebKit/536.10 (KHTML, like Gecko) Chrome/20.0.1121.0 (Dart) Safari/536.10
Command Line /usr/local/bin/dart/dart-sdk/chromium/chrome --remote-debugging-port=9322 --user-data-dir=/home/pete/.dartChromeSettings --bwsi --no-first-run --no-default-browser-check --no-process-singleton-dialog --flag-switches-begin --flag-switches-end about:blank
Executable Path /usr/local/bin/dart/dart-sdk/chromium/chrome
Profile Path /home/pete/.dartChromeSettings/Default

[DartBot]

This comment was originally written by [email protected]

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p.reisinger, it looks like you start the sample from Dart Editor, is it correct?

Seth, do you start the sample from Dart Editor too?

[sethladd]

Indeed. I can try starting natively, I'll let you know. (sorry, didn't know starting from editor might affect things :)

[sethladd]

Just for the record, I can trigger a crash with this version:

Chromium 21.0.1134.0 (Developer Build 136493)
OS Mac OS X
WebKit 537.1 (Source/WebCore/Configurations@500)
JavaScript V8 3.10.8.4
DartVM r7533
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/21.0.1134.0 (Dart) Safari/537.1
Command Line /Users/sethladd/Downloads/dart/dart-sdk/Chromium.app/Contents/MacOS/Chromium --remote-debugging-port=9322 --user-data-dir=/Users/sethladd/.dartChromeSettings --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/dart-sdk/Chromium.app/Contents/MacOS/Chromium
Profile Path /Users/sethladd/.dartChromeSettings/Default

[sethladd]

This is the minimum code to trigger the crash. It looks like decodeAudioData is responsible. If I comment out decodeAudioData, no crash. If I compile this to JavaScript, no crash.

#import('dart:html');

main() {
  AudioContext audioContext = new AudioContext();
  AudioGainNode gainNode = audioContext.createGainNode();
  
  XMLHttpRequest xhr = new XMLHttpRequest();
  xhr.open("GET", "button-3.mp3", true);
  xhr.responseType = "arraybuffer";
  xhr.on.load.add((e) {

    // asynchronous decoding
    audioContext.decodeAudioData(xhr.response, (buffer) {
      // something
    }, (error) {
      print('Error decoding MP3 file');
    });
    
  });
  
  xhr.send();
}

[sethladd]

attaching mp3

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Attachment:
button-3.mp3 (6.58 KB)

[DartBot]

This comment was originally written by [email protected]

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Thanks, this one I can repro.

[DartBot]

This comment was originally written by [email protected]

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The problem is Dartium internal.

Dartium fails to decode .mp3 and attempts to invoke errorCallback passing NULL as AudioBuffer* pointer. We're not prepared for such input and crashed. Fix is pending review.

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Added Started label.

[DartBot]

This comment was originally written by [email protected]

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Added Fixed label.