Weird bugs in DMD 2.81.0

[Steven Schveighoffer]

On 7/6/18 10:21 PM, 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.

FYI there have been a lot of recent changes on druntime that have to do 
with hashing. It's possible something changed that affects you.

Having code that reproduces the issue would be super-useful. If it's 
specifically to do with AA, it should be easily reduced -- just recreate 
the AA in a minimal app and show how it's missing data.

-Steve