marche147 added the comment:
Thanks for the repro! It did help for pinpointing the issue.
So I took a little spare time and dived into xnu kernel code, here is my
assumption based on what I found (N.B. : My assumption comes from a simple
experiment and a brief skim of the source code within
New submission from marche147 :
Consider the following code:
```
import resource
s, h = resource.getrlimit(resource.RLIMIT_STACK)
resource.setrlimit(resource.RLIMIT_STACK, (h, h))
```
Running this under macOS with python 3.6.5 gives the following exception:
```
bash-3.2$ uname -a
Darwin arch
