ScrollController not attached to any scroll views

[pishguy]

The following assertion was thrown while handling a gesture:

ScrollController not attached to any scroll views.
'package:flutter/src/widgets/scroll_controller.dart':
Failed assertion: line 110 pos 12: '_positions.isNotEmpty'

RubberBottomSheetState._onVerticalDragDown (package:diabetist_pro/backend/componets/rubber/src/bottom_sheet.dart:181:33)

[guillaumeprevost]

Hi, first of all thanks for the great plugin! Good work 💯

We have the same issue here!

It seems like it comes from line 182 of bottom_sheet.dart:
_hold = _scrollController.position.hold(_disposeHold);

I've tried to wrap this line into an if (_scrollController.hasClients) and this seems to prevent the exception. But I don't know the plugin well enough to know whether this may have side-effects.

Method after modification:

  void _onVerticalDragDown(DragDownDetails details) {
    if(_hasHeader){
      if(_draggingPeak(details.globalPosition)){
        _setScrolling(false);
      } else {
        _setScrolling(true);
      }
    }
    if(_shouldScroll) {
      assert(_hold == null);
      if (_scrollController.hasClients)
        _hold = _scrollController.position.hold(_disposeHold);
    }
  }

I hope this helps fixing this @mcrovero

[pishguy]

@guillaumeprevost

thanks, could you send PR please?

[mcrovero]

Thanks, that's the best solution for now. I'll fix it in the next release