pypy/module/posix/test/test_posix2.py::AppTestPosix::()::test_popen_child_fds

self = <pypy.interpreter.typedef.W_ObjectObjectUserDictWeakrefable object at 0x00000001114ac608>

    def test_popen_child_fds(self):
            os = self.posix
            with open('/'.join([self.pdir, 'file1']), 'r') as fd:
                with self.posix.popen('%s -c "import os; print os.read(%d, 10)" 2>&1' % (self.python, fd.fileno())) as stream:
                    res = stream.read()
                    if self.plat == 'win32':
                        assert '\nOSError: [Errno 9]' in res
                    else:
>                       assert res == 'test1\n'
E                       (application-level) AssertionError: assert '' == 'test1\n'

[/Users/matti/build-worker-arm64/own-macos-arm64/build/pypy/module/posix/test/test_posix2.py:509]:9: AssertionError

builder: own-macos-arm64 build #1261+

test: pypy/module/posix/test/test_posix2.py::AppTestPosix::()::test_popen_child_fds