Failure to await Future is blocking the engine -> framework roll

[zanderso]

Here: https://github.com/flutter/gallery/blob/master/lib/studies/shrine/app.dart#L87

Gives:

| Analyzing tests...
|
|    info • `Future` results in `async` function bodies must be `await`ed or marked `unawaited` using `package:pedantic` • lib/studies/shrine/app.dart:87:7 • unawaited_futures
|
| 1 issue found. (ran in 31.3s)
ERROR: One or more tests from flutter_gallery failed.
Contacts: raboughanem@google.com, perc@google.com
1 failure.

[guidezpl]

Upstream issue is fixed