bpo-41690: Use a loop to collect args in the parser instead of recursion (GH-22053)

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This program can segfault the parser by stack overflow:

```
import ast

code = "f(" + ",".join(['a' for _ in range(100000)]) + ")"
print("Ready!")
ast.parse(code)
```

the reason is that the rule for arguments has a simple recursion when collecting args:

args[expr_ty]:
    [...]
    | a=named_expression b=[',' c=args { c }] {
        [...] }

...

This commit is contained in:

Pablo Galindo 2020-09-02 17:44:19 +01:00 • committed by GitHub

parent 3940333637

commit 4a97b1517a

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Parser/parser.c

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