[3.8] bpo-35714: Reject null characters in struct format strings (GH-…

[3.8] bpo-35714: Reject null characters in struct format strings (GH-… · python/cpython@5ff5edf

Original file line number	Diff line number	Diff line change
`@@ -652,6 +652,13 @@ def test_format_attr(self):`
`652`	`652`	`s2 = struct.Struct(s.format.encode())`
`653`	`653`	`self.assertEqual(s2.format, s.format)`
`654`	`654`
	`655`	`+def test_issue35714(self):`
	`656`	`+# Embedded null characters should not be allowed in format strings.`
	`657`	`+for s in '\0', '2\0i', b'\0':`
	`658`	`+with self.assertRaisesRegex(struct.error,`
	`659`	`+'embedded null character'):`
	`660`	`+struct.calcsize(s)`
	`661`	`+`
`655`	`662`
`656`	`663`	`class UnpackIteratorTest(unittest.TestCase):`
`657`	`664`	`"""`