gh-103824: fix use-after-free error in Parser/tokenizer.c #103993
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`tok_get_fstring_mode`: ensure that token in the f-string middle is properly decoded, i.e. `tok_nextc` doesn't return EOF with `tok->decoding_erred` set to 1
arhadthedev added the interpreter-core 
pablogsal reviewed May 1, 2023
pablogsal approved these changes May 1, 2023
carljm added a commit to carljm/cpython that referenced this pull request May 1, 2023
* main: (463 commits) pythongh-104057: Fix direct invocation of test_super (python#104064) pythongh-87092: Expose assembler to unit tests (python#103988) pythongh-97696: asyncio eager tasks factory (python#102853) pythongh-84436: Immortalize in _PyStructSequence_InitBuiltinWithFlags() (pythongh-104054) pythongh-104057: Fix direct invocation of test_module (pythonGH-104059) pythongh-100458: Clarify Enum.__format__() change of mixed-in types in the whatsnew/3.11.rst (pythonGH-100387) pythongh-104018: disallow "z" format specifier in %-format of byte strings (pythonGH-104033) pythongh-104016: Fixed off by 1 error in f string tokenizer (python#104047) pythonGH-103629: Update Unpack's repr in compliance with PEP 692 (python#104048) pythongh-102799: replace sys.exc_info by sys.exception in inspect and traceback modules (python#104032) Fix typo in "expected" word in few source files (python#104034) pythongh-103824: fix use-after-free error in Parser/tokenizer.c (python#103993) pythongh-104035: Do not ignore user-defined `__{get,set}state__` in slotted frozen dataclasses (python#104041) pythongh-104028: Reduce object creation while calling callback function from gc (pythongh-104030) pythongh-104036: Fix direct invocation of test_typing (python#104037) pythongh-102213: Optimize the performance of `__getattr__` (pythonGH-103761) pythongh-103895: Improve how invalid `Exception.__notes__` are displayed (python#103897) Adjust expression from `==` to `!=` in alignment with the meaning of the paragraph. (pythonGH-104021) pythongh-88496: Fix IDLE test hang on macOS (python#104025) Improve int test coverage (python#104024) ...
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Fixes use-after-free errors in
tokenizer.cthat are mentioned in #103824.