Failures on [co19] Roll co19 to 741384c83190cdaa648bf77aefcf4b6c0ec75988

There are new test failures on [[co19] Roll co19 to 741384c83190cdaa648bf77aefcf4b6c0ec75988](https://dart-review.googlesource.com/c/sdk/+/160283).

The tests
```
co19/Language/Variables/final_t11 MissingCompileTimeError (expected Pass)
```
are failing on configurations
```
cfe-strong-linux
cfe-weak-linux
```