TextIOWrapper.seek silently wraps around on very large offsets

Open

#91,112 opened on Mar 8, 2022 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 30/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Tech stack: python
Domain: backend

Research direction

Start with the TextIOWrapper.seek behavior described in this issue and review the linked BPO issue 46956. Reproduce the silent wraparound using a very large offset, then identify the relevant CPython IO implementation and tests. Done means the behavior is addressed with regression coverage, but the issue does not name a file or test to use.

Written by the indexing model from the issue text.

Description

3.7 (EOL) topic-IO type-bug

BPO	46956
Nosy	@csernazs, @vlaci

^{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 = None
created_at = <Date 2022-03-08.10:09:03.427>
labels = ['type-bug', '3.7', 'expert-IO']
title = 'TextIOWrapper.seek silently wraps around on very large offsets'
updated_at = <Date 2022-03-08.10:52:26.126>
user = 'https://github.com/vlaci'

bugs.python.org fields:

activity = <Date 2022-03-08.10:52:26.126>
actor = 'csernazs'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['IO']
creation = <Date 2022-03-08.10:09:03.427>
creator = 'vlaci'
dependencies = []
files = []
hgrepos = []
issue_num = 46956
keywords = []
message_count = 1.0
messages = ['414745']
nosy_count = 2.0
nosy_names = ['csernazs', 'vlaci']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue46956'
versions = ['Python 3.7']

Dominant language: Python
Stars: 77.2k
Forks: 36k
Avg merge: 1d 9h
Merged PRs (30d): 558

Contributor guide

Open the contributing guide

First steps

Read the whole issue, then the project's contributing guide.
Comment on the issue to say you are picking it up — it saves two people doing the same work.
Fork the repository and make your change on a branch.
Open a pull request that references the issue number.

Similar issues

[feature][processing] Add profile selection options to qgis_process (Request in QGIS) Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

qgis/QGIS-Documentation#11275 · Opened Sep 21, 2026
fix(automation): do not restart an active subject delivery Open

bug priority:normal ready-for-dev

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

OpenHands/extensions#626 · 1 comment · Opened Sep 21, 2026
Change observation tooltip text Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

CSCfi/sd-search-api#39 · Opened Sep 21, 2026
Schema regression: derivation conversion_failure reverted Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

elong0527/yamaa#708 · Opened Sep 21, 2026
please add to porn list Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

StevenBlack/hosts#3255 · Opened Sep 21, 2026

More Python issues