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* Take re pos/endpos as signed integers Negative values clamp to 0, and values beyond Py_ssize_t raise OverflowError. Assisted-by: Claude Code:claude-opus-5-5 * Port the remaining runtime fixes from #7993 - bytearray: keep the buffer exported while converting the needle of find/count/index/rfind/rindex/__contains__/split/rsplit and the hex separator, so resizing from there raises BufferError - str(): report non-str encoding/errors as "str() argument 'X' must be str, not T", and check argument counts and name/position duplicates for keyword calls - _json.scanstring: take end as a signed integer and raise ValueError when it is out of bounds - lzma: reject filter specs with keys the filter does not take - mmap: raise ValueError when growing a shared anonymous mapping on Linux/NetBSD - _sqlite3: check that the backup progress argument is callable - Remove the expectedFailure markers of the tests these fix Assisted-by: Claude Code:claude-opus-5-5 * Reject arguments given by name and position in FuncArgs::bind_for bind_for reports a keyword that fills a parameter already given by position before other binding errors, using the parameter list of the FromArgs type. getargs shares the message, str() drops its own check, and blake2b/blake2s name themselves in binding errors. Assisted-by: Claude Code:claude-opus-5-5 --------- Co-authored-by: James David Clarke <james@jamesdavidclarke.com>