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gh-126105: Fix crash in `ast` module, when `._fields` is deleted (GH-126115)
Previously, if the `ast.AST._fields` attribute was deleted, attempts to create a new `as`t node would crash due to the assumption that `_fields` always had a non-NULL value. Now it has been fixed by adding an extra check to ensure that `_fields` does not have a NULL value (this can happen when you manually remove `_fields` attribute).
(cherry picked from commit
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| .. | ||
| lexer | ||
| tokenizer | ||
| action_helpers.c | ||
| asdl.py | ||
| asdl_c.py | ||
| myreadline.c | ||
| parser.c | ||
| peg_api.c | ||
| pegen.c | ||
| pegen.h | ||
| pegen_errors.c | ||
| Python.asdl | ||
| string_parser.c | ||
| string_parser.h | ||
| token.c | ||