Minutes_2021_05_11

Numba Meeting: 2021-05-11

Attendees:

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

0. Feature Discussion/admin

• last week stabilizing mainline

  • race condition problem because cached_property not threadsafe

• anything urgent for 0.54

• Discussion on slice boxing (https://github.com/numba/numba/pull/6939)

  
  In [6]: @njit
     ...: def foo(v):
     ...:     a = slice(1, 2, None if v else 3)
     ...:     return a.step
     ...:
     ...:
  
  In [7]: foo(1)
  ---------------------------------------------------------------------------
  TypeError                                 Traceback (most recent call last)
  <ipython-input-7-7d8d25071659> in <module>
  ----> 1 foo(1)
  
  TypeError: expected int64, got None
  
  In [8]: foo(2)
  

  step handling happened: https://github.com/numba/numba/blob/6b82cd7b508b17d9eeb48e54f22dd18c67b711a2/numba/cpython/slicing.py#L166-L174 making optional values: https://github.com/numba/numba/blob/master/numba/core/base.py#L735-L744

1. New Issues

• #7012 - pow() producing incorrect results for negative integer exponent
• #7006 - Call to cuLinkAddData results in UNKNOWN_CUDA_ERROR
  • OS distro packaging problem unrelated to numba
• #7002 - Purely scalar inputs break njit'd functions that utilize np.stack
• #6998 - np.linalg.solve unexpectedly returns an F_CONTIGUOUS array for C_CONTIGUOUS inputs
  • mismatch in np implementation details on array layout
• #6993 - Generators don't get cleaned up on
  • memory leak in generator

Closed Issues

2. New PRs

• #7011 - WIP: Add the check of the 'noalias' attrubute before lowering 'inplace_bin' op, this fix #6949 .
• #7010 - WIP: Add ddof argument to nanvar and nanstd
• #7009 - Add writable args
• #7008 - Added support for np.random.dirichlet with all size arguments
• #7007 - Made stencil compilation not fail for arrays of conflicting types.
• *** #7005 - Make numpy.searchsorted match NumPy when first argument is unsorted
• #7004 - Test extending the CUDA target
• #7003 - More mainline fixes
• #7001 - Make some numba.core modules flake8 compliant
• #6997 - CUDA: Remove catch of NotImplementedError in target.py
• *** #6996 - Add constant lowering support for SliceTypes
  • Todd suggests adding test using in parfors
• #6995 - Resolve issue where nan was being assigned to int type numpy array
• #6992 - Moved typedlist iter into njit code instead of just getitem

Closed PRs

• #7000 - Fix various issues on mainline.
• #6999 - Fix errors introduced by the cloudpickle patch
• #6994 - Wip/fix6990

3. Next Release: Version 0.54.0/0.37.0, RC=June 2021