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Stack overflow in reprlib causes a core dump #69427

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ceridwen mannequin opened this issue Sep 26, 2015 · 2 comments
Closed

Stack overflow in reprlib causes a core dump #69427

ceridwen mannequin opened this issue Sep 26, 2015 · 2 comments
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stdlib Python modules in the Lib dir type-crash A hard crash of the interpreter, possibly with a core dump

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@ceridwen
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Mannequin

ceridwen mannequin commented Sep 26, 2015

BPO 25240
Nosy @rhettinger, @tirkarthi, @iritkatriel

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = None
closed_at = <Date 2021-09-07.16:30:05.794>
created_at = <Date 2015-09-26.16:47:58.489>
labels = ['library', 'type-crash']
title = 'Stack overflow in reprlib causes a core dump'
updated_at = <Date 2021-09-07.16:30:05.793>
user = 'https://bugs.python.org/ceridwen'

bugs.python.org fields:

activity = <Date 2021-09-07.16:30:05.793>
actor = 'iritkatriel'
assignee = 'none'
closed = True
closed_date = <Date 2021-09-07.16:30:05.794>
closer = 'iritkatriel'
components = ['Library (Lib)']
creation = <Date 2015-09-26.16:47:58.489>
creator = 'ceridwen'
dependencies = []
files = []
hgrepos = []
issue_num = 25240
keywords = []
message_count = 2.0
messages = ['251655', '401303']
nosy_count = 4.0
nosy_names = ['rhettinger', 'ceridwen', 'xtreak', 'iritkatriel']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue25240'
versions = ['Python 3.4']
@ceridwen
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ceridwen mannequin commented Sep 26, 2015

I have a linked list implementation made of nested tuples with a custom repr:

    def __repr__(self):
        return 'LinkedList(' + ', '.join(repr(v) for v in self) + ')'

(Iterating over a LinkedList returns just its contents.)

When using Raymond Hettinger's recipe for finding the size in memory of an object, https://code.activestate.com/recipes/577504-compute-memory-footprint-of-an-object-and-its-cont/?in=user-178123 , when I set verbose=True and exceed the recursion limit with reprlib.repr, I get the following error:

Fatal Python error: Cannot recover from stack overflow.

Current thread 0x00007fa24200d700 (most recent call first):
File "<name of LinkedList file>.py", line 327 in __repr__
File "/usr/lib/python3.4/reprlib.py", line 135 in repr_instance
File "/usr/lib/python3.4/reprlib.py", line 64 in repr1
File "/usr/lib/python3.4/reprlib.py", line 54 in repr
File "recipe.py", line 46 in sizeof
[many instances of the above line repeated]
...
Aborted (core dumped)

The line in the recipe it fails when recursing on is:

        print(s, type(o), repr(o), file=stderr)

On 2.7 it fails with a RuntimeError as I'd expect.

@ceridwen ceridwen mannequin added stdlib Python modules in the Lib dir type-crash A hard crash of the interpreter, possibly with a core dump labels Sep 26, 2015
@iritkatriel
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There was work on recursion in newer versions and several similar issues have been confirmed to be fixed. Since you didn't include a complete reproduction script, it's hard to know whether your case was fixed as well. I am therefore closing this, and request that you create a new issue with full reproduction information if you are still seeing this in a current version (>= 3.9).

@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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