Buggy or strange behaviour matching mutable data with `re`

Bug report

Bug description:

import re
data = bytearray(b'1')
match = re.match(b'1', data)
print(match[0])  # b'1'
data[:] = b'2'
print(match[0])  # b'2'

If you match against mutable data (e.g., a bytearray) and change that data after matching, the matched values reported by the match change.

Is this a) a bug or b) strange behavior that should be pointed out in the docs (or c) none of the above)?

CPython versions tested on:

3.13

Operating systems tested on:

Linux

首先，使用可變的 bytearray 執行提供的 Python 3.13 reproducer，並檢查變更後產生的匹配值。閱讀相關的 re 行為和現有測試涵蓋範圍，以判斷這是實作錯誤還是已有文件說明的行為。只有在該行為得到明確解決，並具備相應的回歸測試涵蓋範圍或文件時，才算完成。