ScrollController not attached to any scroll views

[ayzerobug]

ScrollController not attached to any scroll views.
'package:flutter/src/widgets/scroll_controller.dart':
Failed assertion: line 171 pos 12: '_positions.isNotEmpty'

When the exception was thrown, this was the stack:
#2      ScrollController.position (package:flutter/src/widgets/scroll_controller.dart:171:12)
scroll_controller.dart:171
#3      _ChatState.scrollToBottom (package:mobile_chat_ui/src/widgets/chat.dart:94:24)
chat.dart:94
#4      _ChatState.initState.<anonymous closure> (package:mobile_chat_ui/src/widgets/chat.dart:110:57)
chat.dart:110
#5      SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1442:15)
binding.dart:1442```

[pranataprojects]

Hi @ayzerobug I’m still learning Flutter and I ran into the same issue.
From what I understand, this error usually happens because the ScrollController is used before it’s actually attached to a scrollable.

I tried a small fix by:

• Attaching the ScrollController directly to the ListView.builder that shows the messages
• Using WidgetsBinding.instance.addPostFrameCallback to call scrollToBottom() only after the first frame
• Checking if (_scrollController.hasClients) before using position
  This way, the controller only scrolls when it’s safe.
  If the messages list is currently inside a SingleChildScrollView + Column, maybe switching to ListView.builder would also help.

Hope this helps!