LineChartBarData loading data crash

[zhangyakai]

Crash occurs when the following data is first loaded:
List? datas;
List spots = [];
for (int i = 0; i < datas!.length; i++) {
spots.add(datas![i]);
}

LineChartBarData(
spots: datas!,
shadow: const Shadow(color: CMColor.blueColor),
isCurved: true,
gradient: getGradient2(CMColor.blueColor, const Color(0xFF5076AD)),
barWidth: 3,
isStrokeCapRound: true,
dotData: const FlDotData(
show: false,
),
belowBarData: BarAreaData(
show: true,
gradient: getGradient2(CMColor.blueColor.withOpacity(0.3),
const Color(0xFF5076AD).withOpacity(0.3))
),
);

The data was passed in by me using the provider's data.
Crash exception:

• thread Add possibility to select multiple data points #10, name = 'io.flutter.1.raster', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
  frame #0: 0x00000001089f48e0 Flutterimpeller::ContentsFilterInput::GetCoverage(impeller::Entity const&) const + 4 Flutterimpeller::ContentsFilterInput::GetCoverage:
  -> 0x1089f48e0 <+4>: ldr x9, [x0]
  0x1089f48e4 <+8>: ldr x2, [x9, #0x18]
  0x1089f48e8 <+12>: br x2
  Flutter`impeller::FilterContentsFilterInput::~FilterContentsFilterInput:
  0x1089f48ec <+0>: stp x20, x19, [sp, #-0x20]!
  Target 0: (Runner) stopped.

I want to know why this is? How should I solve it?

[imaNNeo]

Please add reproducible code