![package:flutter/src/rendering/layer.dart': Failed assertion: line 2284 pos 12: '_lastOffset != null': is not true - Stack Overflow package:flutter/src/rendering/layer.dart': Failed assertion: line 2284 pos 12: '_lastOffset != null': is not true - Stack Overflow](https://i.stack.imgur.com/9ianU.jpg)
package:flutter/src/rendering/layer.dart': Failed assertion: line 2284 pos 12: '_lastOffset != null': is not true - Stack Overflow
![flutter - Error: RenderBox was not laid out, Failed assertion: line 1940 pos 12: 'hasSize' - Stack Overflow flutter - Error: RenderBox was not laid out, Failed assertion: line 1940 pos 12: 'hasSize' - Stack Overflow](https://i.stack.imgur.com/WBnJv.png)
flutter - Error: RenderBox was not laid out, Failed assertion: line 1940 pos 12: 'hasSize' - Stack Overflow
![Error: Either zero or 2 or more [DropdownMenuItem]s were detected with the same value I/flutter (18363): 'package:flutter/src/material/dropdown.dart': - Stack Overflow Error: Either zero or 2 or more [DropdownMenuItem]s were detected with the same value I/flutter (18363): 'package:flutter/src/material/dropdown.dart': - Stack Overflow](https://i.stack.imgur.com/nX0PJ.png)
Error: Either zero or 2 or more [DropdownMenuItem]s were detected with the same value I/flutter (18363): 'package:flutter/src/material/dropdown.dart': - Stack Overflow
![api - Flutter: A non-null String must be provided to a Text widget. Failed assertion: line 378 pos 10: 'data != null' - Stack Overflow api - Flutter: A non-null String must be provided to a Text widget. Failed assertion: line 378 pos 10: 'data != null' - Stack Overflow](https://i.stack.imgur.com/mrWBM.png)
api - Flutter: A non-null String must be provided to a Text widget. Failed assertion: line 378 pos 10: 'data != null' - Stack Overflow
![Trying to select from Dropdown when app is in maximized mode throws `Failed assertion: line 581 pos 12: 'menuHeight == menuBottom - menuTop': is not true` exception on latest master. · Issue #90964 · flutter/flutter · GitHub Trying to select from Dropdown when app is in maximized mode throws `Failed assertion: line 581 pos 12: 'menuHeight == menuBottom - menuTop': is not true` exception on latest master. · Issue #90964 · flutter/flutter · GitHub](https://user-images.githubusercontent.com/67046386/135427474-01505ff2-566b-43cf-94aa-4d9e5ea0665b.png)
Trying to select from Dropdown when app is in maximized mode throws `Failed assertion: line 581 pos 12: 'menuHeight == menuBottom - menuTop': is not true` exception on latest master. · Issue #90964 · flutter/flutter · GitHub
![flutter - Depending Dropdown failing assert error when you go back to change the first dropdown - Stack Overflow flutter - Depending Dropdown failing assert error when you go back to change the first dropdown - Stack Overflow](https://i.stack.imgur.com/po4VK.gif)
flutter - Depending Dropdown failing assert error when you go back to change the first dropdown - Stack Overflow
![Error: Either zero or 2 or more [DropdownMenuItem]s were detected with the same value I/flutter (18363): 'package:flutter/src/material/dropdown.dart': - Stack Overflow Error: Either zero or 2 or more [DropdownMenuItem]s were detected with the same value I/flutter (18363): 'package:flutter/src/material/dropdown.dart': - Stack Overflow](https://i.stack.imgur.com/BkOw1.png)
Error: Either zero or 2 or more [DropdownMenuItem]s were detected with the same value I/flutter (18363): 'package:flutter/src/material/dropdown.dart': - Stack Overflow
![package:flutter/src/widgets/heroes.dart': Failed assertion · Issue #22025 · flutter/flutter · GitHub package:flutter/src/widgets/heroes.dart': Failed assertion · Issue #22025 · flutter/flutter · GitHub](https://user-images.githubusercontent.com/9134717/46696601-40507c80-cc1b-11e8-99ec-bafbc812d881.png)