May 19, 2025 · May 19, 2025 · May 19, 2025 · May 21, 2025 · May 21, 2025 · May 21, 2025
diff --git a/Lib/gzip.py b/Lib/gzip.py
        if mode and 'b' not in mode:
            mode += 'b'

        if mtime is not None and (mtime < 0 or mtime >= 2**32):
            raise ValueError(f'mtime must be in the range 0 through {2**32-1}')

        try:
            if fileobj is None:
                fileobj = self.myfileobj = builtins.open(filename, mode or 'rb')
diff --git a/Lib/test/test_gzip.py b/Lib/test/test_gzip.py
            self.assertEqual(fRead.mtime, mtime)

    def test_mtime_out_of_range(self):
        #exception should be raised when mtime<0 or mtime>=2**32 and is
        #ValueError should be raised when mtime<0 or mtime>=2**32 and is
        # explicitly specified
        with self.assertRaises(Exception):
        with self.assertRaises(ValueError):
            with gzip.GzipFile(self.filename, 'w', mtime=-1) as fWrite:
                pass
        with self.assertRaises(Exception):
        with self.assertRaises(ValueError):
            with gzip.GzipFile(self.filename, 'w', mtime=2**32) as fWrite:
                pass
Original file line number	Diff line number	Diff line change
Expand Up		@@ -206,6 +206,9 @@ def __init__(self, filename=None, mode=None,
		if mode and 'b' not in mode:
		mode += 'b'

		if mtime is not None and (mtime < 0 or mtime >= 2**32):
		raise ValueError(f'mtime must be in the range 0 through {2**32-1}')

		try:
		if fileobj is None:
		fileobj = self.myfileobj = builtins.open(filename, mode or 'rb')
Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -353,12 +353,12 @@ def test_mtime(self):
		self.assertEqual(fRead.mtime, mtime)

		def test_mtime_out_of_range(self):
		#exception should be raised when mtime<0 or mtime>=2**32 and is
		#ValueError should be raised when mtime<0 or mtime>=2**32 and is
		# explicitly specified
		with self.assertRaises(Exception):
		with self.assertRaises(ValueError):
		with gzip.GzipFile(self.filename, 'w', mtime=-1) as fWrite:
		pass
		with self.assertRaises(Exception):
		with self.assertRaises(ValueError):
		with gzip.GzipFile(self.filename, 'w', mtime=2**32) as fWrite:
		pass

Expand Down