Search results

Under-estimated stack size for recursion limit (macOS + python >= 3.14)

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

OS-mac

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#139231 In python/cpython;

· rokm opened on Sep 22, 2025

1

JIT (interpreter): running hot code with PYTHON_LLTRACE=4 segfaults

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-JIT

type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

Status: Open.

#139193 In python/cpython;

· devdanzin opened on Sep 20, 2025

1 comment

JIT: Failed assertion (trace_length < max_length) in translate_bytecode_to_trace

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-JIT

type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

Status: Open.

#139192 In python/cpython;

· devdanzin opened on Sep 20, 2025

1 comment

Expose Py_SIZE, Py_IS_TYPE, Py_SET_SIZE as functions in the Stable ABI

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-C-API

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#139165 In python/cpython;

· encukou opened on Sep 19, 2025

Use PyBytesWriter in Unicode codecs

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-unicode

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#139156 In python/cpython;

· vstinner opened on Sep 19, 2025

Trace recording JIT

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#139109 In python/cpython;

· Fidget-Spinner opened on Sep 18, 2025



heap overflow in set_dealloc (setobject.c)

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

Status: Open.

#139071 In python/cpython;

· kcatss opened on Sep 17, 2025

8 comments



JIT Planning for 3.15 and 3.16

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-JIT

Status: Open.

#139038 In python/cpython;

· savannahostrowski opened on Sep 17, 2025

1 comment



Improve UX by using fully-qualified name in some TypeError

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138978 In python/cpython;

· smurfix opened on Sep 16, 2025

7 comments

list.sort enhancement proposal: Adaptivity for binarysort

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138946 In python/cpython;

· dg-pb opened on Sep 15, 2025

6 comments



Misleading syntax error for import-as statement followed by erroneous statement on same line

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-parser

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#138944 In python/cpython;

· brianschubert opened on Sep 15, 2025

1 comment



Performance improvements for the MATCH_CLASS opcode

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138912 In python/cpython;

· cdce8p opened on Sep 15, 2025

2 comments

Improve error message when trying to delete builtin

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138890 In python/cpython;

· sergey-miryanov opened on Sep 14, 2025

13 comments



Assigning to a keyword generates unclear SyntaxError message

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-parser

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138885 In python/cpython;

· StanFromIreland opened on Sep 14, 2025



subtype_dealloc for heap types is a footgun

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-C-API

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#138870 In python/cpython;

· da-woods opened on Sep 13, 2025

case ...: generates unclear SyntaxError message

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-parser

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138864 In python/cpython;

· sobolevn opened on Sep 13, 2025

4 comments



Improve syntax error message for case 1: statement

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-parser

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138857 In python/cpython;

· sobolevn opened on Sep 12, 2025

1

2 comments



Linkage conflict when buildin with a C++ compiler and Python 3.14 free-threaded

buildThe build process and cross-buildThe build process and cross-build

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#138762 In python/cpython;

· clin1234 opened on Sep 10, 2025

1 comment

Provide access to the __STDC_IEC_559__ macro

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138580 In python/cpython;

· skirpichev opened on Sep 6, 2025

18 comments

Indentation error while getting annotation of function with an template-string as return type

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-typing

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#138558 In python/cpython;

· 15r10nk opened on Sep 5, 2025

12 comments

Adjust the value in objects' insertion order array to the index - position.

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138453 In python/cpython;

· markshannon opened on Sep 3, 2025

Minor change to LOAD_ATTR Opcode in 3.13 not documented

docsDocumentation in the Doc dirDocumentation in the Doc dir

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

Status: Open.

#138402 In python/cpython;

· CarrBen opened on Sep 2, 2025

1 comment

Rationalize and complete the main JIT optimizer pass

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

topic-JIT

Status: Open.

#138378 In python/cpython;

· markshannon opened on Sep 2, 2025

4 comments

Assigning to a slice of a list with a step of -1 should permit assigning a different number of items

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138357 In python/cpython;

· larryhastings opened on Sep 1, 2025

9 comments

tuple unpacking is slower than tuple(list comprehension)

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#138325 In python/cpython;

· user202729 opened on Sep 1, 2025

10 comments