[issue40355] The ast module fails to reject certain malformed nodes

[Batuhan Taskaya]

Change by Batuhan Taskaya :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue40355] The ast module fails to reject certain malformed nodes

[miss-islington]

miss-islington  added the comment:


New changeset 2a3b876b0286b22a9058510d9e51dc4d60eeb89a by Miss Islington (bot) 
in branch '3.8':
bpo-40355: Improve error messages in ast.literal_eval with malformed Dict nodes 
(GH-19868)
https://github.com/python/cpython/commit/2a3b876b0286b22a9058510d9e51dc4d60eeb89a


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[issue40355] The ast module fails to reject certain malformed nodes

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:


New changeset c21c51235aa8061da6b0593d6f857f42fd92fd8b by Curtis Bucher in 
branch 'master':
bpo-40355: Improve error messages in ast.literal_eval with malformed Dict nodes 
(GH-19868)
https://github.com/python/cpython/commit/c21c51235aa8061da6b0593d6f857f42fd92fd8b


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[issue40355] The ast module fails to reject certain malformed nodes

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 5.0 -> 6.0
pull_requests: +19262
pull_request: https://github.com/python/cpython/pull/19947

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[issue40355] The ast module fails to reject certain malformed nodes

[Curtis Bucher]

Change by Curtis Bucher :


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keywords: +patch
nosy: +curtisbucher
nosy_count: 4.0 -> 5.0
pull_requests: +19181
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19868

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[issue40355] The ast module fails to reject certain malformed nodes

[Batuhan Taskaya]

Batuhan Taskaya  added the comment:

See https://bugs.python.org/msg360767 for ast.unparse's point of view regarding 
malformed nodes.

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nosy: +BTaskaya, pablogsal

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[issue40355] The ast module fails to reject certain malformed nodes

[Rémi Lapeyre]

Change by Rémi Lapeyre :


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nosy: +remi.lapeyre

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[issue40355] The ast module fails to reject certain malformed nodes

[Brandt Bucher]

New submission from Brandt Bucher :

There are several places in the ast module where the use of zip is allowing 
malformed nodes to have unpaired children silently thrown away. A couple of 
short examples:

>>> from ast import Constant, Dict, literal_eval, unparse
>>> nasty_dict = Dict(keys=[Constant("I don't have a value!")], values=[])
>>> unparse(nasty_dict)
'{}'
>>> literal_eval(nasty_dict)
{}

I'm currently working on a patch to raise errors instead.

--
assignee: brandtbucher
components: Library (Lib)
messages: 366938
nosy: brandtbucher
priority: normal
severity: normal
status: open
title: The ast module fails to reject certain malformed nodes
type: behavior
versions: Python 3.9

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