a03cb5841e
Closes https://github.com/dart-lang/sdk/issues/51345 TEST=vm/dart/isolates/fast_object_copy2_test Change-Id: I09cf0b896b9e0bc268168c27c7f6cf1220ccd1c6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/282028 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Martin Kustermann <kustermann@google.com>