New submission from Martin Teichmann:
The arguments of a function which was decorated to be a context manager are
stored inside the context manager, and are thus kept alive.
This is a memory leak.
Example:
@contextmanager
def f(a):
do_something_with(a)
a = None # should release the memory
yield
if this is now called with something big, say
with f(something_really_huge):
pass
then this something_really_huge is kept alive during the with statement, even
though the function explicitly let go of it.
----------
components: Library (Lib)
messages: 293234
nosy: Martin.Teichmann
priority: normal
severity: normal
status: open
title: release arguments of contextmanager
type: resource usage
versions: Python 3.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue30306>
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