Issues

• Tracking: RPython on Python 3 hosts

  pypy/pypy#5601 · Filter by author RonnyPfannschmidt opened on Sep 27, 2026
  2

• cpyext instance created by object.__new__ retains its dictionary on PyPy 8.0.0 / Python 3.11

  pypy/pypy#5584 · Filter by author Zaczero opened on Sep 20, 2026
  5

• Extra JUMP_FORWARD in try clauses, missed in the exception table work

  performance/jit
  pypy/pypy#5568 · Filter by author mattip opened on Aug 19, 2026
  1

• Py 3.12 PEP 709 comprehension inlining

  pypy/pypy#5496 · Filter by author mattip opened on Jun 8, 2026
  1

• optimizeopt/vector.py: user_loop_bail_fast_path never returns True

  pypy/pypy#5482 · Filter by author lifthrasiir opened on May 19, 2026
  1

• deprecated exc.value.message in tests

  pypy/pypy#5479 · Filter by author mattip opened on May 18, 2026
  1

• Emit the RPython file/linenumber in fatal errors rather than the C file/linenumber

  pypy/pypy#5461 · Filter by author mattip opened on May 2, 2026

• making closures with keyword-only arguments with default values is slow

  pypy/pypy#5438 · Filter by author cfbolz opened on Apr 14, 2026

• builtin functions __kwdefaults__ dict is mutable

  pypy/pypy#5437 · Filter by author cfbolz opened on Apr 14, 2026

• Add PyPy to OSS Fuzz?

  pypy/pypy#5426 · Filter by author StanFromIreland opened on Apr 10, 2026
  2

• Method to de-vendor expat

  pypy/pypy#5390 · Filter by author stefanor opened on Mar 19, 2026
  9

• Behavioral Differences between CPython and PyPy

  pypy/pypy#5379 · Filter by author zahinwahab opened on Feb 27, 2026
  2

• Feature request: time.monotonic_ns()

  windows
  pypy/pypy#5376 · Filter by author Jean-Luc-Picard-2021 opened on Feb 6, 2026

• Behavioral Discrepancies between CPython and PyPy

  pypy/pypy#5369 · Filter by author zahinwahab opened on Jan 15, 2026
  4

• function.__get__(None, None) should raise TypeError, but PyPy returns a method object instead

  pypy/pypy#5362 · Filter by author EgodPrime opened on Dec 22, 2025

• os.ST_NOEXEC is not supported

  pypy/pypy#5359 · Filter by author mostthingsweb opened on Dec 6, 2025
  1

• A threading call error in pypy3.11

  pypy/pypy#5348 · Filter by author F18-Maverick opened on Nov 5, 2025
  5

• list.sort is callable without key argument

  pypy/pypy#5345 · Filter by author bjorn-martinsson opened on Nov 1, 2025
  1

• Loading of any *,pyd fails on Windows - PyPy PyPy 7.3.20 Windows x64

  windows
  pypy/pypy#5342 · Filter by author boyedarat opened on Oct 20, 2025
  5

• missing globals from socket module compared to CPython 3.11

  pypy/pypy#5340 · Filter by author eqvinox opened on Oct 12, 2025

• Huge memory comsumption when reading a large block of data from a small BytesIO stream

  pypy/pypy#5332 · Filter by author Miauwkeru opened on Sep 25, 2025
  7

• Memory Leak on lzma decompression

  pypy/pypy#5330 · Filter by author davit555 opened on Sep 19, 2025
  21

• Crash while running concurent threads in memory-constrained settings

  pypy/pypy#5325 · Filter by author skirpichev opened on Aug 17, 2025

• os.closerange is slow for large ranges

  pypy/pypy#5324 · Filter by author xhantu opened on Aug 13, 2025
  1

• List copying performance

  pypy/pypy#5315 · Filter by author commongeek opened on Jul 24, 2025
  4