#4841: Fix FileIO constructor to honor closefd when called repeatedly
Patch by Victor Stinner.
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index b9972f3..72feff5 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -593,6 +593,19 @@
self.assertEqual(rawio.read(2), None)
self.assertEqual(rawio.read(2), b"")
+ def test_fileio_closefd(self):
+ # Issue #4841
+ with self.open(__file__, 'rb') as f1, \
+ self.open(__file__, 'rb') as f2:
+ fileio = self.FileIO(f1.fileno(), closefd=False)
+ # .__init__() must not close f1
+ fileio.__init__(f2.fileno(), closefd=False)
+ f1.readline()
+ # .close() must not close f2
+ fileio.close()
+ f2.readline()
+
+
class CIOTest(IOTest):
def test_IOBase_finalize(self):