1429339 - Rescheduling WebAudio AudioParam with setValueCurveAtTime throws SyntaxError

Status: NEW

(Core :: Web Audio, defect, P2)

Description

[Márton Salomváry]

Attachment: ffbug.html

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20180103231032

Steps to reproduce:

Reschedule the value curve of an AudioParam with setValueCurveAtTime that was scheduled earlier with the same method.


Actual results:

A "SyntaxError: An invalid or illegal string was specified" exception is thrown at the second call to setValueCurveAtTime. The second scheduling attempt does not have any effect on the AudioParam.


Expected results:

The second setValueCurveAtTime should not throw, it should reschedule the value curve value. According to the WebAudio spec this exception should never be thrown and the  reschedule attempts are valid uses of setValueCurveAtTime:
https://webaudio.github.io/web-audio-api/#dom-audioparam-setvaluecurveattime

Comment 1

[Ciprian Muresan [:cmuresan], Formerly of Ecosystem QA - please needinfo @mcoman for things regarding the team]

User Agent 	Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0
Build ID 	20180114220708

The issue is also reproducible on Windows 10 x64, Windows 7 x64 and Ubuntu 14.04 x64 using the latest Release 57.0.4 and Nightly 59.