New submission from saaj:
I was chaning an implementation of the function that is passed to json.dumps to
extend serializable types. By a mistake (**return** instead of **raise**) it
turned into, which at its minum can be expressed as::
def d(obj):
return TypeError(repr(obj))
json.dumps(1j, default = d)
After a few moments by laptop froze, though after a minute I could open shell
in separate session, and top command showed that python interpretter is
consuming about 4GiB of memory and 50% of 4 logical cores.
Worst about it it doesn't end with any exception, it just keeps running.
Without ``repr`` it ends up with somewhat expected ``RuntimeError: maximum
recursion depth exceeded while getting the str of an object``.
The same behaviour is on python3, where it just consumes memory with less speed.
OS:
Linux Mint 15 Olivia
Linux 3.8.0-31-generic #46-Ubuntu SMP Tue Sep 10 20:03:44 UTC 2013 x86_64
Packages are last available:
python 2.7.4-0ubuntu1
python3 3.3.1-0ubuntu1
P.S. Sorry for confirming on console at python.org.
----------
components: Library (Lib)
messages: 216071
nosy: saaj
priority: normal
severity: normal
status: open
title: Memory bomb by incorrect custom serializer to json.dumps
versions: Python 2.7, Python 3.3
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue21213>
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