The SecurityError was being hidden because of
https://github.com/dart-lang/sdk/issues/56772.
With this, single-stepping through the test succeeds.
Change-Id: I47a768e803598d5f918a4d2bed9aa4391377464f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/386401
Auto-Submit: Srujan Gaddam <srujzs@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Commit-Queue: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
