Numpy: numba

Fall-back from the nopython compilation path to the object mode compilation path has been detected, this is deprecated behaviour.
https://github.com/numba/numba/issues/3907
https://stackoverflow.com/questions/57285547/numba-jit-warnings-interpretation-in-python
https://github.com/lmcinnes/umap/issues/252
http://numba.pydata.org/numba-doc/latest/reference/deprecation.html#deprecation-of-object-mode-fall-back-behaviour-when-using-jit

numba.transforms:finding looplift candidates
Segmentation fault
https://github.com/numba/numba/commit/6b7912d1b9674aa8b3469637026ec5d980d71611
https://numba.pydata.org/numba-doc/dev/user/troubleshoot.html

numba.transforms:finding looplift candidates
https://github.com/numba/numba/pull/4755/files#diff-44bde1fad10a1ae76eb9b40a005b2b19L10
https://github.com/sklam/numba/blob/b3e58305ad28fca750568345ed5c5fd3facf88f2/numba/transforms.py
https://github.com/numba/numba/issues/5045
https://github.com/numba/numba/tree/release0.49/numba

numba @njit 什么意思
https://github.com/numba/numba/issues/5045
https://zhuanlan.zhihu.com/p/68852771 i.e., numba从入门到精通（8）—numba官方文档参数整理与注意事项

This error may have been caused by the following argument(s):

• argument 0: cannot determine Numba type of