[issue215555] Parser crashes for deeply nested list displays

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[issue215555] Parser crashes for deeply nested list displays

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[issue215555] Parser crashes for deeply nested list displays

[Ralf Schmitt]

Ralf Schmitt added the comment:

Ok, I've upped the limit to some very high value and tried to provoke a
stack overflow.
eval([*x+]*x) segfaults on my machine for x somewhere around 2
(linux, amd64). When setting MAXSTACK to 5000 eval([*x+]*x) works
for x = 333. So, I guess this should be safe guess (even for the BSDs,
which have a smaller default stack size).

BTW: The hardest part was recognizing that nothing gets rebuilt and that
more then parser.o depended on parser.h. Don't you have some kind of
automatic dependency tracking? Or am I missing some build tools?

Anyway, patch in http://bugs.python.org/issue1881


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[issue215555] Parser crashes for deeply nested list displays

[Christian Heimes]

Christian Heimes added the comment:

Parser/parser.h was not in the list of dependencies. I fixed it in r60151

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nosy: +tiran


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[issue215555] Parser crashes for deeply nested list displays

[Ralf Schmitt]

Ralf Schmitt added the comment:

Ofcouse the problem was not logging, but I wanted to replay those
commands. This is where I got the error.


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[issue215555] Parser crashes for deeply nested list displays

[Ralf Schmitt]

Ralf Schmitt added the comment:

Well, I've been a victim of this one yesterday in a real world example.
I'm logging the repr of arguments to XMLRPC method calls and we happen
to use nested lists, which where deep enough to overflow that stack.

It's now 8 years later and I can live with the parser using 60K memory.
I think this limit should be upped a bit.

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versions: +Python 2.6


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[issue215555] Parser crashes for deeply nested list displays

[Guido van Rossum]

Guido van Rossum added the comment:

Fine, submit a patch. Might as well open a new bug for the patch
(referring to this one for background).


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[issue215555] Parser crashes for deeply nested list displays

[Ralf Schmitt]

Changes by Ralf Schmitt:


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nosy: +schmir


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