[issue13001] test_socket.testRecvmsgTrunc failure on FreeBSD 7.2 buildbot

[Charles-François Natali]

New submission from Charles-François Natali <neologix at free.fr>:

http://www.python.org/dev/buildbot/all/builders/x86 FreeBSD 7.2 3.x/builds/2129/steps/test/logs/stdio

"""
======================================================================
FAIL: testRecvmsgTrunc (test.test_socket.RecvmsgUDPTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/home/db3l/buildarea/3.x.bolen-freebsd7/build/Lib/test/test_socket.py", line 1666, in testRecvmsgTrunc
    self.checkFlags(flags, eor=False)
  File "/usr/home/db3l/buildarea/3.x.bolen-freebsd7/build/Lib/test/test_socket.py", line 1354, in checkFlags
    self.assertEqual(flags & mask, checkset & mask)
AssertionError: 0 != 16

======================================================================
FAIL: testRecvmsgTrunc (test.test_socket.RecvmsgIntoUDPTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/home/db3l/buildarea/3.x.bolen-freebsd7/build/Lib/test/test_socket.py", line 1666, in testRecvmsgTrunc
    self.checkFlags(flags, eor=False)
  File "/usr/home/db3l/buildarea/3.x.bolen-freebsd7/build/Lib/test/test_socket.py", line 1354, in checkFlags
    self.assertEqual(flags & mask, checkset & mask)
AssertionError: 0 != 16
"""

This fails because MSG_TRUNC isn't always set in msg_flags when receiving a truncated datagram with recvmsg().
It's a known kernel bug (http://svnweb.freebsd.org/base?view=revision&revision=211030), fixed in FreeBSD 8 (and the test indeed passes on the FreeBSD 8 buildbot).

The patch attached skips the test on FreeBSD < 8 (and introduces @support.requires_freebsd_version).

----------
components: Tests
files: freebsd_msgtrunc.diff
keywords: needs review, patch
messages: 144188
nosy: haypo, neologix
priority: normal
severity: normal
stage: patch review
status: open
title: test_socket.testRecvmsgTrunc failure on FreeBSD 7.2 buildbot
type: behavior
versions: Python 3.3
Added file: http://bugs.python.org/file23182/freebsd_msgtrunc.diff

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13001>
_______________________________________