> https://buildbot.python.org/all/#/builders/152/builds/409

That's AMD64 FreeBSD Shared 3.x: there are still tons of SCTP failures.

"Log: sendfile() does currently not support SCTP sockets. Therefore, fail the call."

I don't understand why the test passed previously... was it simply skipped?

Test on FreeBSD 12.1:
---
vstinner@freebsd$ uname -a
FreeBSD freebsd 12.1-RELEASE-p2 FreeBSD 12.1-RELEASE-p2 GENERIC  amd64

vstinner@freebsd$ ./python -m test test_socket -v -m '*SCTP*'
== CPython 3.9.0a4+ (heads/master:a45b695b9f, Mar 17 2020, 10:42:05) [Clang 8.0.1 (tags/RELEASE_801/final 366581)]
== FreeBSD-12.1-RELEASE-p2-amd64-64bit-ELF little-endian
== cwd: /usr/home/vstinner/python/master/build/test_python_1636
== CPU count: 8
== encodings: locale=UTF-8, FS=utf-8
0:00:00 load avg: 0.23 Run tests sequentially
0:00:00 load avg: 0.23 [1/1] test_socket
testSendmsg (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgAfterClose (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgAncillaryGenerator (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgArray (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgBadArgs (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgBadCmsg (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgBadMultiCmsg (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgDataGenerator (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgDontWait (test.test_socket.SendmsgSCTPStreamTest) ... skipped 'MSG_DONTWAIT not known to work on this platform when sending'
testSendmsgExcessCmsgReject (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgExplicitNoneAddr (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgGather (test.test_socket.SendmsgSCTPStreamTest) ... ok
testSendmsgTimeout (test.test_socket.SendmsgSCTPStreamTest) ... ok
testRecvmsg (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgAfterClose (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgBadArgs (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgEOF (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgExplicitDefaults (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgFromSendmsg (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgLongAncillaryBuf (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgOverflow (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgPeek (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgShortAncillaryBuf (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgShorter (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgTimeout (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsgTrunc (test.test_socket.RecvmsgSCTPStreamTest) ... ok
testRecvmsg (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgAfterClose (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgEOF (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgExplicitDefaults (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgFromSendmsg (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgIntoArray (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgIntoBadArgs (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgIntoGenerator (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgIntoScatter (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgLongAncillaryBuf (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgOverflow (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgPeek (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgShortAncillaryBuf (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgShorter (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgTimeout (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok
testRecvmsgTrunc (test.test_socket.RecvmsgIntoSCTPStreamTest) ... ok

----------------------------------------------------------------------

Ran 42 tests in 0.327s

OK (skipped=1)

== Tests result: SUCCESS ==

1 test OK.

Total duration: 746 ms
Tests result: SUCCESS
---