test failure in test_close_initiating_remote_no_error[sys.executable]

Hi,

in an attempt to package execnet for openSUSE, our build fails with:

[   18s] =================================== FAILURES ===================================
[   18s] ____________ test_close_initiating_remote_no_error[sys.executable] _____________
[   18s] 
[   18s] testdir = <Testdir local('/tmp/pytest-of-abuild/pytest-3/test_close_initiating_remote_no_error0')>
[   18s] anypython = local('/usr/bin/python2')
[   18s] 
[   18s]     def test_close_initiating_remote_no_error(testdir, anypython):
[   18s]         p = testdir.makepyfile("""
[   18s]             import sys
[   18s]             sys.path.insert(0, sys.argv[1])
[   18s]             import execnet
[   18s]             gw = execnet.makegateway("popen")
[   18s]             print ("remote_exec1")
[   18s]             ch1 = gw.remote_exec("channel.receive()")
[   18s]             print ("remote_exec1")
[   18s]             ch2 = gw.remote_exec("channel.receive()")
[   18s]             print ("termination")
[   18s]             execnet.default_group.terminate()
[   18s]         """)
[   18s]         testdir.makepyfile(apipkg=apipkg)
[   18s]         popen = subprocess.Popen(
[   18s]             [str(anypython), str(p), str(execnetdir)],
[   18s]             stdout=None, stderr=subprocess.PIPE,)
[   18s]         out, err = popen.communicate()
[   18s]         print (err)
[   18s]         err = err.decode('utf8')
[   18s]         lines = [
[   18s]             x for x in err.splitlines()
[   18s]             if '*sys-package' not in x]
[   18s]         # print (lines)
[   18s] >       assert not lines
[   18s] E       assert not ['Traceback (most recent call last):', '  File "/tmp/pytest-of-abuild/pytest-3/test_close_initiating_remote_no_error0/... '  File "/tmp/pytest-of-abuild/pytest-3/test_close_initiating_remote_no_error0/apipkg.py", line 12, in <module>', ...]

Full build log here:
https://build.opensuse.org/package/live_build_log/devel:languages:python/python-execnet/openSUSE_Tumbleweed/x86_64

It looks like some unexpected interaction with apipkg and python 2.7.
Shouldn't this test being excluded for 2.7 then, or do you have other ideas, what's going wrong?

Our build facility attempts to build the package for 2.7 and 3.* by default, depending on the build target.

从 test_close_initiating_remote_no_error[sys.executable] 开始，并使用 apipkg 在 Python 2.7 下复现 openSUSE 失败。阅读完整的 traceback 以识别不兼容性；完成的标准是测试在受支持的 Python 版本上通过，或者 Python 2.7 的处理已得到明确解决并由测试套件覆盖。