SDL and new Thread open two windows

[SrMordred via Digitalmars-d-learn]

On Saturday, 2 September 2017 at 03:47:24 UTC, Adam D. Ruppe 
wrote:
> On Saturday, 2 September 2017 at 03:41:47 UTC, SrMordred wrote:
>> Whats going on , and how to prevent this ?
>
> Are you using a static this anywhere?

Hm, right.
I was constructing the window there.
Forgot that static this will execute on all threads.
Thanks!

Removing the code from "static this" solved.
putting "__gshared" also.
But "shared" crashes the programs...