Unittest crash on macOS 10.14

[rainman110]

The azure pipeline on macOS crashed running the unit tests:
https://dev.azure.com/DLR-SC/tigl/_build/results?buildId=120&view=logs&j=5b08ef7f-a1c3-507b-61aa-990725944352&t=17da43bf-c8b7-5525-58dd-721403c11888&l=385

I could reproduce this error in an macOS 10.14 VM. The error seems to come from the exception handling machanism and is similar to the following issue:
lastpass/lastpass-cli#447

Somehow, some object is beeing freed in a wrong way during stack unwinding.

A minimal example is required to completely understand the origin of this issue, but I suspect the origin to be in OCCT.

[rainman110]

Rebuilding oce / occt on macOS 10.14 with the native compilers fixes this problem, but this is not a true solution for our problem. I am trying to figure out, what the actual problem is.

[rainman110]

This issue seems to come from mixing different compilers.

A good solution is to simply switch to the macOS 10.13 image in the azure builds.