[New-bugs-announce] [issue3712] memoryview leaks references

[Amaury Forgeot d'Arc]

New submission from Amaury Forgeot d'Arc <amauryfa at gmail.com>:

Two problems with memoryview:
- The buffer interface of memoryview leaks a reference:
    str(memoryview(b'text'), 'utf-8')

- memoryview does not implement tp_traverse and tp_clear, so reference
cycle cannot be collected, as with:

import gc
class MyBuf(bytes): pass

def f():
    buf = MyBuf(b'abc')
    m = memoryview(buf)
    buf.m = m
    gc.collect();gc.collect();gc.collect()

each call to f() leaks 6 references.

----------
messages: 72078
nosy: amaury.forgeotdarc
priority: release blocker
severity: normal
status: open
title: memoryview leaks references
versions: Python 3.0

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3712>
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