Trivial simple OpenGl working example

[drug]

08.07.2021 18:46, Виталий Фадеев пишет:
> On Thursday, 8 July 2021 at 15:30:07 UTC, drug wrote:
>> 08.07.2021 17:20, Виталий Фадеев пишет:
>>> [...]
>>
>> I failed to reproduce that. What platform you use and what is the 
>> compiler version?
> 
> drug, Linux, Ubuntu, x64
> # uname -a
> Linux unknown 5.11.0-22-generic #23-Ubuntu SMP Thu Jun 17 00:34:23 UTC 
> 2021 x86_64 x86_64 x86_64 GNU/Linux
> 
> # dmd --version
> DMD64 D Compiler v2.097.0
> 
> # dub --version
> DUB version 1.26.0, built on Jun  3 2021
> 
> #  pkg-config --modversion sdl2
> 2.0.14

Yes, it's reproducible with dmd 2.097. Trivial fix is deleting that line 
`../../sdl2/gfm/sdl2/timer.d:69` then it works.