Timer errors occur when leaving page with animation

[brainlid]

Describe the bug
Either document proper usage or enable a Spinkit animation to dispose it's own timer.

Timer errors occur when closing the page with the animation on it.

SpinKit name

SpinKitPouringHourglass

Description/Usage

I'm displaying the SpinKitPouringHourglass on a stateless page. The widget is used this way:

  Widget build(BuildContext context) {

    // ...

    List<Widget> displayList = [
      titleSection,
      Align(
        alignment: Alignment.center,
        child: SpinKitPouringHourglass(
          color: theme.primaryColor,
          size: 90.0,
        )
      ),
      instructionsSection,
    ];

    return new Scaffold(
      appBar: new AppBar(
        title: new Text('Questionnaire'),
      ),
      body: new ListView(children: displayList),
    );
  }

The errors occur when I hit the "Back" button to pop the nav stack and return to the opening page.

Error Logs

I/flutter (20208): _SpinKitPouringHourglassState#3447a(ticker active) was disposed with an active Ticker.
I/flutter (20208): _SpinKitPouringHourglassState created a Ticker via its SingleTickerProviderStateMixin, but at the
I/flutter (20208): time dispose() was called on the mixin, that Ticker was still active. The Ticker must be disposed
I/flutter (20208): before calling super.dispose(). Tickers used by AnimationControllers should be disposed by calling
I/flutter (20208): dispose() on the AnimationController itself. Otherwise, the ticker will leak.
I/flutter (20208): The offending ticker was: Ticker(created by _SpinKitPouringHourglassState#3447a(lifecycle state:
I/flutter (20208): created))

[brainlid]

I changed the SpinKit icon to the SpinKitPumpingHeart and SpinKitRotatignPlain and both worked correctly. No errors after popping the page.

[jogboms]

@brainlid, sorry for the delays, holiday season here. This issue has been addressed and is coming up on the next release.