This test catches an issue previously uncaught by tests where offsets for indices were written incorrectly and could therefore lead to errors when deserializingelements in deferred mode.
Change-Id: I14bf80bbe4fa47c12e543679803c7be38582a0e5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/252300
Commit-Queue: Nate Biggs <natebiggs@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>