Issue #14713 has been updated by ioquatix (Samuel Williams).
I made a patch for write_nonblock. But this probably equally applies to send, sendmsg, etc. Perhaps we can discuss the right course of action to cover all these cases.
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Bug #14713: <internal:prelude>:132:in `__write_nonblock': Protocol wrong type for socket (Errno::EPROTOTYPE)
https://bugs.ruby-lang.org/issues/14713#change-71721
* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v:
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
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Very occasionally on macOS, using Ruby 2.5.0, I get the above error.
```
Traceback (most recent call last):
23: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-1.6.0/lib/async/task.rb:74:in `block in initialize'
22: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-io-1.7.0/lib/async/io/socket.rb:79:in `block in accept'
21: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-io-1.7.0/lib/async/io/socket.rb:46:in `block in accept_each'
20: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/server.rb:51:in `accept'
19: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/server.rb:51:in `catch'
18: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/server.rb:52:in `block in accept'
17: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/protocol/http1.rb:59:in `receive_requests'
16: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/protocol/http11.rb:75:in `receive_requests'
15: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/server.rb:54:in `block (2 levels) in accept'
14: from /Users/samuel/Documents/socketry/falcon/lib/falcon/server.rb:33:in `handle_request'
13: from /Users/samuel/Documents/socketry/falcon/lib/falcon/verbose.rb:46:in `call'
12: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/middleware.rb:45:in `call'
11: from /Users/samuel/Documents/socketry/falcon/lib/falcon/proxy.rb:71:in `call'
10: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/client.rb:65:in `call'
9: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/protocol/http11.rb:98:in `call'
8: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-http-0.20.0/lib/async/http/protocol/http11.rb:112:in `write_request'
7: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-io-1.7.0/lib/async/io/stream.rb:76:in `flush'
6: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-io-1.7.0/lib/async/io/stream.rb:175:in `syswrite'
5: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-io-1.7.0/lib/async/io/generic.rb:47:in `block in wrap_blocking_method'
4: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-io-1.7.0/lib/async/io/generic.rb:124:in `async_send'
3: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-io-1.7.0/lib/async/io/generic.rb:131:in `async'
2: from /Users/samuel/.rvm/gems/ruby-2.5.0/gems/async-io-1.7.0/lib/async/io/generic.rb:125:in `block in async_send'
1: from <internal:prelude>:132:in `write_nonblock'
```
I'm not even sure how it's possible to receive this message in `write_nonblock` since by that point the socket is well and truely setup. Maybe a bug in the OS?
I'm not sure how to reproduce, I've only seen it once a month and I don't have any strategy to reproduce yet. I could try a busy loop.
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