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Diffstat (limited to 'Lib/test/string_tests.py')
| -rw-r--r-- | Lib/test/string_tests.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/test/string_tests.py b/Lib/test/string_tests.py index 4b82d51..1814a55 100644 --- a/Lib/test/string_tests.py +++ b/Lib/test/string_tests.py @@ -767,6 +767,15 @@ class BaseTest: self.checkraises(TypeError, 'hello', 'replace', 42, 'h') self.checkraises(TypeError, 'hello', 'replace', 'h', 42) + def test_replacement_on_buffer_boundary(self): + # gh-127971: Check we don't read past the end of the buffer when a + # potential match misses on the last character. + any_3_nonblank_codepoints = '!!!' + seven_codepoints = any_3_nonblank_codepoints + ' ' + any_3_nonblank_codepoints + a = (' ' * 243) + seven_codepoints + (' ' * 7) + b = ' ' * 6 + chr(256) + a.replace(seven_codepoints, b) + def test_replace_uses_two_way_maxcount(self): # Test that maxcount works in _two_way_count in fastsearch.h A, B = "A"*1000, "B"*1000 |