Issue #13444: When stdout has been closed explicitly, we should not attempt to flush it at shutdown and print an error.
This also adds a test for issue #5319, whose resolution introduced the issue.
diff --git a/Lib/test/test_cmd_line.py b/Lib/test/test_cmd_line.py
index 56a8e39..8167e78 100644
--- a/Lib/test/test_cmd_line.py
+++ b/Lib/test/test_cmd_line.py
@@ -272,6 +272,25 @@
self.assertRegex(err.decode('ascii', 'ignore'), 'SyntaxError')
self.assertEqual(b'', out)
+ def test_stdout_flush_at_shutdown(self):
+ # Issue #5319: if stdout.flush() fails at shutdown, an error should
+ # be printed out.
+ code = """if 1:
+ import os, sys
+ sys.stdout.write('x')
+ os.close(sys.stdout.fileno())"""
+ rc, out, err = assert_python_ok('-c', code)
+ self.assertEqual(b'', out)
+ self.assertRegex(err.decode('ascii', 'ignore'),
+ 'Exception IOError: .* ignored')
+
+ def test_closed_stdout(self):
+ # Issue #13444: if stdout has been explicitly closed, we should
+ # not attempt to flush it at shutdown.
+ code = "import sys; sys.stdout.close()"
+ rc, out, err = assert_python_ok('-c', code)
+ self.assertEqual(b'', err)
+
def test_main():
test.support.run_unittest(CmdLineTest)