Weird bugs in DMD 2.81.0

[solidstate1991]

On Saturday, 7 July 2018 at 02:21:31 UTC, solidstate1991 wrote:
> I'll upload code tomorrow, but here's the premise:
>
> Sometimes elements disappear from associative arrays, causing 
> all sorts of errors down the line, mostly access violations.
>
> My engine (PixelPerfectEngine) has a style sheet for its GUI, 
> which generates basic values upon construction. This works 
> mostly fine with PixelPerfectEditor, however WindowMaker 
> crashes instantly when it needs to redraw anything. Both Mago 
> and VS debugger were bit broken (first exception came from 
> KernelBase.dll, then it only showed the caller of a getter 
> function possibly caused the issue), but I managed to get 
> enough information. The AA containing color indexes 
> (ushort[string]) couldn't be accessed properly and when I tried 
> the safe get method on it, a lot of values couldn't be accessed 
> and later on a dynamic array had issues with access violation.
>
> I'm thinking on going back to 2.080.0 until this bug gets fixed.

I found a temporary workaround. Basically I just save the content 
of the AA, then reapply it after the application's constructor 
finished, before that it always generated an exception when I 
tried to check its content e.g. via printing it to the screen. 
The program still crashes when I close it, and it seems like it's 
something GC related, which will be extremely hard to reproduce. 
I'm going to make a commit soon to Github (maybe even an alpha 
release), so people can check it out for themselves.