BugDomain: Error MessagesEffort: ModerateHelp Wanted
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説明
There are certain locations where arrow functions don't parse
var x = window.foo || () => {}
In these instances, it would be nice if users could get a better error message as to avoid issues like #25897.
Ideally this should not be an invasive change.
- The change should be limited in scope.
- The parser should continue erroring in those locations.
- The change must not introduce change how existing valid code is parsed.