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bpo-45820: Fix a segfault when the parser fails without reading any input (GH-29580)
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Fix a segfault when the parser fails without reading any input. Patch by
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Pablo Galindo
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@ -368,6 +368,14 @@ tokenizer_error(Parser *p)
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void *
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_PyPegen_raise_error(Parser *p, PyObject *errtype, const char *errmsg, ...)
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{
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if (p->fill == 0) {
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va_list va;
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va_start(va, errmsg);
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_PyPegen_raise_error_known_location(p, errtype, 0, 0, 0, -1, errmsg, va);
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va_end(va);
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return NULL;
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}
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Token *t = p->known_err_token != NULL ? p->known_err_token : p->tokens[p->fill - 1];
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Py_ssize_t col_offset;
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Py_ssize_t end_col_offset = -1;
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