Erroneous code objects created with PyCode_New

[timmcl]

BPO	856623

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

Show more details

GitHub fields:

assignee = None
closed_at = <Date 2005-12-19.03:45:12.000>
created_at = <Date 2003-12-09.03:15:01.000>
labels = []
title = 'Erroneous code objects created with PyCode_New'
updated_at = <Date 2005-12-19.03:45:12.000>
user = 'https://bugs.python.org/timmcl'

bugs.python.org fields:

activity = <Date 2005-12-19.03:45:12.000>
actor = 'nnorwitz'
assignee = 'nnorwitz'
closed = True
closed_date = None
closer = None
components = ['None']
creation = <Date 2003-12-09.03:15:01.000>
creator = 'timmcl'
dependencies = []
files = []
hgrepos = []
issue_num = 856623
keywords = []
message_count = 3.0
messages = ['19336', '19337', '19338']
nosy_count = 2.0
nosy_names = ['nnorwitz', 'timmcl']
pr_nums = []
priority = 'normal'
resolution = 'works for me'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue856623'
versions = []

[timmcl]

If you copy a code object by calling say new.code with
just the members of an existing code object with
free/cell variables - such as the following nested example:

def null():
    return None

def wrapfunc(func):
    def _inner(*args):
       return func(*args)
    return _inner

wrapped = wrapfunc(null)

code_object = wrapped.func_code

new_code_object = new.code(<  code_object  >)

then the new_code_object will not have had its
free/cell vars removed and will thus not disassemble
correctly. Furthermore
if you create a function out of it, then calling the
function will raise -
SystemError:
R:Python23srcPython-2.3.2Objectscellobject.c:
22: bad argument to internal function

Looking at the code in PyCode_New I can't see why this
should happen.

(Bug noticed on Python 2.3.2 on windows)

[nnorwitz]

Logged In: YES
user_id=33168

I don't think this is still a bug any longer.
new.function() seems to require closure be passed in if the
function has cell variables.

When I disassemble new_code_object, I get the same as the
original.

[nnorwitz]

Logged In: YES
user_id=33168

Assuming this is fixed.