[audiobuffer-copy-channel.html]
  [X 4: buffer.copyToChannel(x, 0, -1) incorrectly threw IndexSizeError: "AudioBuffer.copyToChannel: Start index (4294967295) is out of range".]
    expected: FAIL

  [# AUDIT TASK RUNNER FINISHED: 2 out of 5 tasks were failed.]
    expected: FAIL

  [X 5: buffer.copyFromChannel(x, 0, -1) incorrectly threw IndexSizeError: "AudioBuffer.copyFromChannel: Start index (4294967295) is out of range".]
    expected: FAIL

  [< [copyFrom-exceptions\] 1 out of 11 assertions were failed.]
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1525330
    expected: FAIL

  [< [copyTo-exceptions\] 1 out of 10 assertions were failed.]
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1525330
    expected: FAIL

  [Executing "copyFrom-exceptions"]
    expected:
      if not early_beta_or_earlier: FAIL

  [Executing "copyTo-exceptions"]
    expected:
      if not early_beta_or_earlier: FAIL

