Minutes_2019_12_03

Numba Meeting: 2019-12-03

Attendees: Todd, Aaron, Val, Stuart, Stan, Siu, Pearu, James

Status on stabilizing master
- a problem with inferred dtype for np.arange
- Much hacking has gotten us as far as we can until we can distinguish "python-like" integer types from "numpy-like" integer types
- hacked test to accept dtype mismatch (int64 instead of int32) on win-64 only
- will merge by end of today if everything works

#4914 - Cryptic error when compiling a function obtained via exec with bad __name__
- not a bug
- should give a better error message
#4913 - feature request, 3 argument form of pow built in
- low priority
#4912 - bitarray support
#4908 - RuntimeError: cannot cache function 'square': no locator available for file
- bug; pip; egg; pkgresource
#4906 - Generator performance
- Refct impact perf
- hard
#4905 - Numba typed list not supported with NUMBA_DISABLE_JIT
- let typedlist fallback to list in disabled jit
- coverage
**** #4903 - Parallel prange gives LoweringError
- failing in type infer after parfor transformation
#4899 - Callwrapper cleaning-up too soon
#4898 - try excepts support
#4897 - Support for numpy.isnat in nopython mode needed since no w/a longer exists
- feature request
#4895 - Numba talks -- scipy 2019
#4894 - Using string[:] data types as class attributes.
4922 - prange reduction incorrect when operation happens inside a conditional block
- need to do a proper analysis instead of simple pattern-matching

#4911 - np.interp bugfix for float32 handling
**** #4910 - loop canonicalisation and type aware tuple unroller/loop body versioning passes
- unroll tuple iteration
- added guards to explicitly enable the passes
- getting unittests to pass
#4909 - Fix some spelling typos
#4904 - Implement np.lcm
**** #4902 - [WIP] basic support for try except
- implemented as syntactic-sugar
- to-test:
  - check IR-inlining
#4901 - fix typed list equals
#4900 - [4899] fixed issue with PyCallWrapper and inconsistent Python/nopython ownership trees
**** #4896 - Specialise arange dtype on arch + python version.

#4892 - regex needs to accept singular form of "argument"
#4891 - skip the xfail test for now. Py3.8 CFG refactor seems to have changed the test case
#4885 - suppress spurious RuntimeWarning about ufunc sizes

CPython 3.8
Requests for 0.47 (last release for the year) - jitclass performance issues - llvm 9 trial - CTK libcudadevrt.a - CI needs to take 50% of current time - Val & Stu already looking at this - also checking Azure CI config to avoid wasting compute time - Caching: - transitive dependency - other issues: i.e. function as argument, with objmode - distributing cache - Immutable list and deprecating reflected list - Switch to pytest (see above) - Using Numba to generate LLVM/NVVM IR for different targets https://github.com/numba/numba/issues/4546 - @overload for gpu