Sam Rawlins d693078bbf Analyzer: new diagnostic: UNNECESSARY_QUESTION_MARK ...

`null` is already a valid value of `dynamic` and `Null`, so adding a question
mark to make `dynamic?` or `Null?` is unnecessary, and could lead to confusion.

Fixes https://github.com/dart-lang/sdk/issues/45165

Change-Id: I710ff12935767dd635edfdb026033aa8e27e7804
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/190041
Commit-Queue: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>

2021-03-23 19:55:11 +00:00

..

error.dart

Analyzer: new diagnostic: UNNECESSARY_QUESTION_MARK

2021-03-23 19:55:11 +00:00

listener.dart

Flow analysis: begin tracking non-promotion reasons.

2021-02-02 16:15:34 +00:00