New submission from Kevin Modzelewski:
The slice type doesn't participate in GC, which means that if you happen to
create a cycle involving a slice, that cycle will never get freed. Here's an
example:
def f():
l = []
l.append(slice(l))
# Will consume memory without bound:
while True:
f()
This seems pretty hard to trigger accidentally, so it might not be a huge deal
-- especially since it seems to have been around for a while. (I only checked
2.7 and trunk though.)
I think this could be solved by either having the slice class participate in GC
(ie add tp_traverse and tp_clear methods), or maybe doing some type-filtering
during slice_new().
----------
components: Interpreter Core
messages: 262582
nosy: Kevin Modzelewski
priority: normal
severity: normal
status: open
title: slice() leaks memory when part of a cycle
type: resource usage
versions: Python 2.7, Python 3.6
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Python tracker <[email protected]>
<http://bugs.python.org/issue26659>
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