_NativeSocket causes a crash by completing a Future twice

[fzyzcjy]

Steps to Reproduce

1. Run flutter create bug.
2. Thank you for the framework! Cannot provide a simple reproducible sample, but the problem exists and affects many users.

Expected results:

No error

Actual results:

Error:

String: Bad state: Future already completed
  File "future_impl.dart", line 45, in _AsyncCompleter.complete
  File "socket_patch.dart", line 847, in _NativeSocket.tryConnectToResolvedAddresses.connectNext.<fn>
  File "socket_patch.dart", line 1214, in _NativeSocket.issueWriteEvent.issue
  File "socket_patch.dart", line 1221, in _NativeSocket.issueWriteEvent
  File "socket_patch.dart", line 1242, in _NativeSocket.multiplex
  File "isolate_patch.dart", line 184, in _RawReceivePortImpl._handleMessage

Logs

N/A

no analysis errors.

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• No issues found!

[TahaTesser]

Similar crash issue seems to be related to dart in Flutter, labelling

[mraleph]

This was fixed and cherry picked into 2.0.3 (dart-lang/sdk#45214)

[fzyzcjy]

Sounds great!

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.