Emergency Self-Construct

@disadone thanks for asking about this. This is a long standing feature request which is both a lot of work to implement and also probably not too straightforward. As such,...

> If this has already been implemented for Numba's version of `np.sum`, then why can't it be made to work for the other functions as well? Guessing here: probably this...

@crusaderky thanks for submitting this, it will almost certainly take some triaging to get to the bottom of this. My initial reaction to your analysis regarding race conditions when writing...

``` 💥 zsh» ipython Python 3.7.4 (default, Aug 13 2019, 15:17:50) Type 'copyright', 'credits' or 'license' for more information IPython 7.8.0 -- An enhanced Interactive Python. Type '?' for help....

@JSKenyon thanks for hashing this out! Here is the traceback from my terminal session: ``` zsh» python foo082.py OMP: Info #270: omp_set_nested routine deprecated, please use omp_set_max_active_levels instead. OMP: Info...

@JSKenyon I don't think we can decide yet if this is solvable as we haven't figured out the root cause yet.

#3938 implements a better error message in such cases. For example, in the case above it will print: ``` 💥 zsh» python v3.py :( Traceback (most recent call last): File...

Since this is a feature request and it is probably still wanted, I'll change the title now to reflect what is being requested.

@monocongo thanks for the kind words! We appreciate you using Numba. 😄

@adizhol that is correct, so sorry.