Erroneous error about an unexhaustive switch in dart2js only #51823
Description
Related to flutter/flutter#123242.
Building a dart2js app internally without that change results in the following error:
package:flutter/src/widgets/focus_traversal.dart:474:28:
Error: The type 'TraversalEdgeBehavior' is not exhaustively matched by the switch cases.
- 'TraversalEdgeBehavior' is from 'package:flutter/src/widgets/focus_traversal.dart'.
switch (nearestScope.traversalEdgeBehavior) {
^
package:flutter/src/widgets/focus_traversal.dart:492:28:
Error: The type 'TraversalEdgeBehavior' is not exhaustively matched by the switch cases.
- 'TraversalEdgeBehavior' is from 'package:flutter/src/widgets/focus_traversal.dart'.
switch (nearestScope.traversalEdgeBehavior) {
^
Error: Compilation failed.
This can be "fixed" by changing this line to pass an explicit false and changing this line to set an explicit true as well. Essentially, forcing the CFE to evaluate constants eagerly.
cc @sigmundch for triage, I am not sure if I should assign this to area-web or area-frontend