Zichang Guo
fdf4762c99
This is a reland of c326c587c5
The fix is to remove "_availableDatagram" check at the start of receive(). Since receive() can be called without receiver being listening, this check will block the receive().
Original change's description:
> [dart:io] Fix hanging on zero-length datagram
>
> This is observed on Win and Linux.
> Here is a doc to explain the problem: https://docs.google.com/document/d/1ZzyBUMrDHLU6vNryjgSMJfUruOdpmTImtE_s2E0J8IQ/edit?usp=sharing.
>
> Bug: https://github.com/dart-lang/sdk/issues/39910
> Change-Id: Ia961239f45615f14108bcd66043ac33d9a0a4abe
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/137425
> Commit-Queue: Zichang Guo <zichangguo@google.com>
> Reviewed-by: Siva Annamalai <asiva@google.com>
Bug: https://github.com/dart-lang/sdk/issues/39910
Change-Id: Iefc0af96ed4e1b433396bb5fe11276e8a04c00d5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/140164
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Zichang Guo <zichangguo@google.com>