[#105450] [Ruby master Feature#18228] Add a `timeout` option to `IO.copy_stream` — "byroot (Jean Boussier)" <noreply@...>
Issue #18228 has been reported by byroot (Jean Boussier).
11 messages
2021/09/27
[ruby-core:105233] [Ruby master Bug#17617] When a Ractor's incoming port is closed, Ractor.receive_if does not raise Ractor::ClosedError, but instead blocks indefinitely
From:
"mame (Yusuke Endoh)" <noreply@...>
Date:
2021-09-14 01:40:27 UTC
List:
ruby-core #105233
Issue #17617 has been updated by mame (Yusuke Endoh).
Assignee set to ko1 (Koichi Sasada)
----------------------------------------
Bug #17617: When a Ractor's incoming port is closed, Ractor.receive_if does not raise Ractor::ClosedError, but instead blocks indefinitely
https://bugs.ruby-lang.org/issues/17617#change-93641
* Author: dazuma (Daniel Azuma)
* Status: Open
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
* ruby -v: ruby 3.1.0dev (2021-02-09T13:22:37Z master e7a831de8e) [x86_64-darwin20]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
If Ractor#close_incoming is called on a Ractor, any pending Ractor.receive call will raise Ractor::ClosedError. However, any pending Ractor.receive_if call will not; instead, it never returns.
```
r1 = Ractor.new do
Ractor.receive
rescue => e
e
end
r1.close_incoming
result = r1.take
puts "**** taken: #{result}" # displays the Ractor::ClosedError
r2 = Ractor.new do
Ractor.receive_if { true }
puts "**** never reaches here"
rescue => e
puts "**** never reaches here"
e
end
r2.close_incoming
puts "**** hangs here..."
r2.take
puts "**** never reaches here"
```
This was tested against both 3.0.0 and 3.1.0 head, with the same result.
```
% ruby -v
ruby 3.1.0dev (2021-02-09T13:22:37Z master e7a831de8e) [x86_64-darwin20]
```
```
% ruby -v
ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-darwin20
```
I have also tried including sleep statements to force the Ractor.receive_if to execute both before and after the Ractor#close_incoming call. The result is the same either way. receive_if hangs regardless of whether the incoming port is already closed when receive_if is invoked, or whether the port is closed while the receive_if is already blocking.
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