>>> import ast
>>> dir(ast.AST)
['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__match_args__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '_attributes', '_fields']
>>> del ast.AST._fields
>>> dir(ast.AST)
['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__match_args__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '_attributes']
>>> t = ast.AST(arg1=123)
Segmentation fault
Crash report
What happened?
This happens because fields variable is null-pointer here, moreover it was previously checked for null here.
CPython versions tested on:
3.11
Operating systems tested on:
Linux
Output from running 'python -VV' on the command line:
Python 3.11.9 (main, Oct 28 2024, 23:26:29) [GCC 13.2.0]
Linked PRs
astmodule, when._fieldsis deleted #126115astmodule, when._fieldsis deleted (GH-126115) #126130astmodule, when._fieldsis delet… #126132