[New-bugs-announce] [issue33153] interpreter crash when multiplying large tuples

[Ivan Zakharyaschev]

New submission from Ivan Zakharyaschev <imz at altlinux.org>:

The issue https://bugs.python.org/msg314475 has arisen for tuples (but not for lists, as in the example there) in 2.7.14 for me. How should we fix it in a better way?

This bug is not reproducible in python 3.5.4.

[builder at localhost ~]$ python
Python 2.7.14 (default, Nov  7 2017, 17:07:17) 
[GCC 6.3.1 20170118 (ALT 6.3.1-alt2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> x = [0] * 2**20
>>> x *= 2**20
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
MemoryError
>>> x = [0,0,0,0,0,0] * 2**20
>>> x *= 2**20
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
MemoryError
>>> x = ('a', 'b')
>>> x = ('a', 'b') * 2**20
>>> x *= 2**20
Segmentation fault
[builder at localhost ~]$ python --version
Python 2.7.14
[builder at localhost ~]$ python
Python 2.7.14 (default, Nov  7 2017, 17:07:17) 
[GCC 6.3.1 20170118 (ALT 6.3.1-alt2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.maxsize
2147483647
>>> sys.maxint
2147483647
>>> 
[builder at localhost ~]$ python RPM/BUILD/Python-2.7.14/Lib/test/test_tuple.py
test_addmul (__main__.TupleTest) ... ok
test_bigrepeat (__main__.TupleTest) ... Segmentation fault
[builder at localhost ~]$

----------
components: Interpreter Core
messages: 314508
nosy: imz
priority: normal
severity: normal
status: open
title: interpreter crash when multiplying large tuples
type: crash
versions: Python 2.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33153>
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