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__length_hint__() of bytearray iterator can return negative integer #71630

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serhiy-storchaka opened this issue Jul 2, 2016 · 4 comments
Closed

__length_hint__() of bytearray iterator can return negative integer #71630

serhiy-storchaka opened this issue Jul 2, 2016 · 4 comments
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interpreter-core (Objects, Python, Grammar, and Parser dirs) type-bug An unexpected behavior, bug, or error

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@serhiy-storchaka
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BPO 27443
Nosy @rhettinger, @serhiy-storchaka
Files
  • bytearray_iterator_length_hint.patch
    		•

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

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    GitHub fields:

    assignee = None
closed_at = <Date 2016-07-03.12:18:19.108>
created_at = <Date 2016-07-02.19:53:54.043>
labels = ['interpreter-core', 'type-bug']
title = '__length_hint__() of bytearray iterator can return negative integer'
updated_at = <Date 2016-07-03.12:18:19.107>
user = 'https://github.com/serhiy-storchaka'

    bugs.python.org fields:

    activity = <Date 2016-07-03.12:18:19.107>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2016-07-03.12:18:19.108>
closer = 'serhiy.storchaka'
components = ['Interpreter Core']
creation = <Date 2016-07-02.19:53:54.043>
creator = 'serhiy.storchaka'
dependencies = []
files = ['43612']
hgrepos = []
issue_num = 27443
keywords = ['patch']
message_count = 4.0
messages = ['269729', '269735', '269761', '269764']
nosy_count = 3.0
nosy_names = ['rhettinger', 'python-dev', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue27443'
versions = ['Python 3.5', 'Python 3.6']
    @serhiy-storchaka
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    >>> ba = bytearray(b'ab')
>>> it = iter(ba)
>>> next(it)
97
>>> ba.clear()
>>> list(it)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: __length_hint__() should return >= 0

    Proposed patch fixes this issue.

    @serhiy-storchaka serhiy-storchaka added interpreter-core (Objects, Python, Grammar, and Parser dirs) type-bug An unexpected behavior, bug, or error labels Jul 2, 2016
    @rhettinger
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    This patch looks correct. Nice catch.

    @python-dev
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    Mannequin

    python-dev mannequin commented Jul 3, 2016

    New changeset 6b084bb6c38b by Serhiy Storchaka in branch '3.5':
    Issue bpo-27443: __length_hint__() of bytearray itearator no longer return
    https://hg.python.org/cpython/rev/6b084bb6c38b

    New changeset 03192909160d by Serhiy Storchaka in branch 'default':
    Issue bpo-27443: __length_hint__() of bytearray itearator no longer return
    https://hg.python.org/cpython/rev/03192909160d

    @serhiy-storchaka
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    Thanks Raymond.

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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    @rhettinger @serhiy-storchaka