Stack overflow when parse long expression to AST

BPO | [32758](https://bugs.python.org/issue32758)
--- | :---
Nosy | @brettcannon, @terryjreedy, @ncoghlan, @benjaminp, @serhiy-storchaka, @Mariatta, @csabella, @tirkarthi
PRs | <li>python/cpython#5960</li><li>python/cpython#6041</li><li>python/cpython#6042</li><li>python/cpython#6043</li><li>python/cpython#6045</li><li>python/cpython#6046</li><li>python/cpython#6047</li><li>python/cpython#6048</li><li>python/cpython#16565</li><li>python/cpython#16566</li>

<sup>*Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.*</sup>

<details><summary>Show more details</summary><p>

GitHub fields:
```python
assignee = None
closed_at = <Date 2019-10-18.08:02:07.842>
created_at = <Date 2018-02-03.18:22:51.069>
labels = ['easy', 'type-crash', 'docs']
title = 'Stack overflow when parse long expression to AST'
updated_at = <Date 2019-10-18.08:02:07.841>
user = 'https://github.com/serhiy-storchaka'
```

bugs.python.org fields:
```python
activity = <Date 2019-10-18.08:02:07.841>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2019-10-18.08:02:07.842>
closer = 'serhiy.storchaka'
components = ['Documentation']
creation = <Date 2018-02-03.18:22:51.069>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 32758
keywords = ['patch', 'easy']
message_count = 26.0
messages = ['311568', '311570', '311920', '311922', '311945', '311978', '311993', '312009', '312030', '312701', '313165', '313185', '313192', '313495', '313500', '313501', '313502', '313503', '313506', '313508', '313509', '313510', '313511', '336476', '354869', '354870']
nosy_count = 9.0
nosy_names = ['brett.cannon', 'terry.reedy', 'ncoghlan', 'benjamin.peterson', 'docs@python', 'serhiy.storchaka', 'Mariatta', 'cheryl.sabella', 'xtreak']
pr_nums = ['5960', '6041', '6042', '6043', '6045', '6046', '6047', '6048', '16565', '16566']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue32758'
versions = ['Python 2.7']
```

</p></details>


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Stack overflow when parse long expression to AST #76939

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BPO	32758
Nosy	@brettcannon, @terryjreedy, @ncoghlan, @benjaminp, @serhiy-storchaka, @Mariatta, @csabella, @tirkarthi
PRs	bpo-32758: warn that a couple ast functions can crash the interpreter #5960 [3.7] bpo-32758: Warn that ast.parse() and ast.literal_eval() can segfault the interpreter (GH-5960) #6041 [3.6] bpo-32758: Warn that ast.parse() and ast.literal_eval() can segfault the interpreter (GH-5960) #6042 bpo-32758: Warn that compile() can crash when compiling to an AST object #6043 [3.7] bpo-32758: Warn that compile() can crash when compiling to an AST object (GH-6043) #6045 [3.6] bpo-32758: Warn that compile() can crash when compiling to an AST object (GH-6043) #6046 bpo-32758: Warn that dbm.dumb.open() can crash Python #6047 [3.7] bpo-32758: Warn that dbm.dumb.open() can crash Python (GH-6047) #6048 [2.7] bpo-32758: warn that a couple ast functions can crash the interpreter (GH-5960) #16565 [2.7] bpo-32758: Warn that compile() can crash when compiling to an AST object (GH-6043) #16566

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Stack overflow when parse long expression to AST #76939

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