2fda7f8002
+ strengthen checkState invariants in the path of the error. Handles problem brought out by #37776 Change-Id: I55165a1bdaa3a8a0910d71c6d56472bdbfe592c0 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/113183 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Aske Simon Christensen <askesc@google.com>