Compiling with -profile=gc makes program crash - why?

[jmh530 via Digitalmars-d]

On Thursday, 21 April 2016 at 09:23:26 UTC, tcak wrote:
>
> You are using "spawn". So it is a multithreaded program. 
> -profile=gc doesn't work with multithreadd programs. Always 
> creates problems.

Then it would probably help if that is mentioned on this page 
somewhere.
https://dlang.org/dmd-windows.html