tree 65bc82de5e11da629bc64096fe5af020630d1572
parent a4ba658dfbe6984cc480091d2a81eabfa838a8a9
author Jens Johansen <jensj@google.com> 1546591176 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1546591176 +0000

Be explicit about whether a reference is allowed to be null or not

Before this change we allowed to serialize some references as null,
and would only complain when trying to read the dill back in.
This CL changes that so it complains up front.

It is unknown if any of this would ever occur in practise.

Change-Id: Id5e1af89abfb88a2d4249bd439b53b062d7aeffa
Reviewed-on: https://dart-review.googlesource.com/c/85392
Reviewed-by: Kevin Millikin <kmillikin@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>