message: Fix that occasionally miss painting instruction.
diff: @@ -233,7 +233,7 @@ PathProxy.prototype = {
  this._ctx && this._ctx.arc(cx, cy, r, startAngle, endAngle, anticlockwise);
  this._xi = mathCos(endAngle) * r + cx;
  - this._yi = mathSin(endAngle) * r + cx;
  + this._yi = mathSin(endAngle) * r + cy;
  return this;
  },
  