This looks like it was an oversight--previous to this change, there
was zero test coverage for this case.
Change-Id: I4301a3ba90aedce3b0fcd901649c370cba522f4e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/353280
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
