python / python/cpython

Inconsistent results for min() and max() with math.nan as argument

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3.11 3.12 3.13 interpreter-core type-bug
Dominant language
Python
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Description

BPO 44370
Nosy @rhettinger, @mdickinson, @stevendaprano, @serhiy-storchaka, @sweeneyde

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 = None
created_at = <Date 2021-06-10.01:54:15.874>
labels = ['interpreter-core', 'type-bug', '3.9']
title = 'Inconsistent results for min() and max() with math.nan as argument'
updated_at = <Date 2021-06-13.09:23:18.604>
user = 'https://bugs.python.org/joellarose'

bugs.python.org fields:

activity = <Date 2021-06-13.09:23:18.604>
actor = 'rhettinger'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2021-06-10.01:54:15.874>
creator = 'joel.larose'
dependencies = []
files = []
hgrepos = []
issue_num = 44370
keywords = []
message_count = 14.0
messages = ['395497', '395498', '395501', '395506', '395507', '395509', '395521', '395561', '395576', '395621', '395623', '395624', '395736', '395737']
nosy_count = 6.0
nosy_names = ['rhettinger', 'mark.dickinson', 'steven.daprano', 'serhiy.storchaka', 'Dennis Sweeney', 'joel.larose']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44370'
versions = ['Python 3.9']

Contributor guide

Open the contributing guide

First steps

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

Research direction

No implementation files, tests, or entry points are identified in the issue. Start by reading the linked BPO issue and reproducing the reported min() and max() behavior with math.nan; done means the intended behavior is agreed and the relevant inconsistency is covered by tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
compilers
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
28/100

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