I got an error on my mac, what i did is just hot reload project after coding a sub widget, i tried to find out what is wrong, just like run AS instead of vc code, clean cache, and restart mac…please get my some idea, thank you~
dart : 2.2.0
flutter: 1.2.1
here is the log:
Launching lib/main.dart on iPhone XR in debug mode...
Compiler message:
org-dartlang-debug:synthetic_debug_expression:1:1: Error: Getter not found: '_debugCanPerformMutations'.
_debugCanPerformMutations
^^^^^^^^^^^^^^^^^^^^^^^^^
org-dartlang-debug:synthetic_debug_expression:1:1: Error: The getter '_debugCanPerformMutations' isn't defined for the class 'RenderViewport'.
- 'RenderViewport' is from 'package:flutter/src/rendering/viewport.dart' ('file:///Users/makw/flutter/packages/flutter/lib/src/rendering/viewport.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named '_debugCanPerformMutations'.
_debugCanPerformMutations
^^^^^^^^^^^^^^^^^^^^^^^^^
org-dartlang-debug:synthetic_debug_expression:1:1: Error: Getter not found: '_semanticsConfiguration'.
_semanticsConfiguration
^^^^^^^^^^^^^^^^^^^^^^^
org-dartlang-debug:synthetic_debug_expression:1:1: Error: The getter '_semanticsConfiguration' isn't defined for the class 'RenderViewport'.
- 'RenderViewport' is from 'package:flutter/src/rendering/viewport.dart' ('file:///Users/makw/flutter/packages/flutter/lib/src/rendering/viewport.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named '_semanticsConfiguration'.
_semanticsConfiguration
^^^^^^^^^^^^^^^^^^^^^^^
seems related to #35980
I fixed by
I got the same problem. Deleting Breakpoints and variables and restart did not help
After that a flutter clean worked. I get the problem quite often….
The fix landed on flutter master channel: flutter/flutter@a29906d