Andrei Kulakov <andrei....@gmail.com> added the comment:
One possibility for this being a breaking change is this scenario: some codebase may have logic that takes a list and uses a slice operation on it; in a rare circumstance the list is really a dict and a TypeError is caught upstream and dealt with; with this change it will no longer be caught/logged and the dict will be unexpectedly modified. It might also be hard to debug. I don't remember seeing such code but it's conceivable. The change might still be worth it for performance improvement though - I'm not sure. ---------- nosy: +andrei.avk _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42454> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
