Why does a switch break cause a segmentation fault

[adamgoldberg via Digitalmars-d-learn]

Hey, I just happened to be writing a program in D an stumbled 
upon a bug, that causes it to terminate after receiving a SEGV 
signal, nothing wierd so far but it looks everything I tried 
shows it is the break statement inside of a switch.
It seems to have a relatively random chance of occuring, and also 
somewhat dependant on the compiler, and build mode used.
I'm short on time so instead of rewriting my SO post I will just 
link it.

Here! 
https://stackoverflow.com/questions/57153617/random-segmentation-fault-in-d-lang-on-switch-break

Hope someone can help!