Minutes_2023_11_28

Numba Meeting: 2023-11-28

Attendees: Da Li, Guilherme, Siu Kwan Lam, Val, Stuart, Dipto, Kaustubh FPOC (last week): Kautubh FPOC (incoming): Guilherme

NOTE: All communication is subject to the Numba Code of Conduct.

Please refer to this calendar for the next meeting date.

0. Discussion

• Python 3.12 update
  • Merge now, test overnight.
• Numba 0.59 RC update
  • 3.12 mostly done
  • PRs for 3.8 removal, objmode fallback removal and refactoring pending.
• https://github.com/numba/numba/issues/9288 -- is this even technically possible? (Val)
  • Very complex issue, deeply technical, maybe feasible for workqueue but unclear until someone actually tries. The other backends are very questionable.
  • The problem is that the program may not be in a recoverable state, Numba sends a signal with a message at present to inform the user opposed to ending up in that unrecoverable state (in practice this would be a deadlock, a SIGSEGV or general corruption).
  • We may be able to send a Python signal
    • e.g https://docs.python.org/3/c-api/exceptions.html#c.PyErr_SetInterruptEx
• Should #5520 be locked? Lots of users commenting with the same thing. The fix is doable, put into 0.60?
  • Locked and assigned stu.
  • Fix should be relatively simple.
• Is it possible to audit news snippets. 1. check that the snippet matches the PR 2. check that the RST is valid.
  • Needs an issue to be created
• Removal of CompilationCache, compile_isolated, run_nullary_func utils.benchmark and "nested context" in the targets.
• Update cloudpickle alongside Python 3.8 removal?
  • Siu to look into new cloudpickle 3.0.0 which adds official support for python 3.12
• Why is numba/mviewbuf.c called that an not numba/_mviewbuf.c like all the other C/C++ files?
  • We'll do a rename for the C source file
• Should 0.59 drop NumPy 1.22 support?
  • Not yet, NEP-029 says Jan 01, 2024 is 1.23+.
  • Do this if we have time

New "Ready for Review" PRs

1. New Issues

• numba#9300 - [Python 3.12] LOAD_FAST_AND_CLEAR
• numba#9304 - Add configurable cache idempotency key
  • May not be the best way to use the flag
  • Agree this feature is needed
  • Current caching mechanism must also consider other libraries
• numba#9305 - Support Safe/Unsafe casts between CharSeq types.

Closed Issues

• numba#9298 - Type of variable 'account_state.1' cannot be determined, operation
• numba#9299 - Numba not catching exception

2. New PRs

• numba#9295 - Improve reorderable ufunc support
• numba#9296 - Fix bug when axis is negative and check when axis is invalid
• numba#9297 - Add axis support to np.take
• numba#9301 - Release Notes 0.58.1 for main
• numba#9302 - add missing backtick to example git tag command
• numba#9303 - Add category to warning
• numba#9306 - Charseq to charseq cast

Closed PRs

3. Short-term Roadmap

gantt: https://github.com/numba/numba/issues/8971