Illegal behaviour or GDC bug?

[Peter Campbell via Digitalmars-d-learn]

On Thursday, 13 October 2016 at 20:18:31 UTC, ketmar wrote:
> sadly, gdc has way older frontend version than ldc (and dmd, of 
> course). gdc is like 2.067, and ldc/dmd is 2.072. that this was 
> fixed in later versions, but gdc is not updated yet.

OK that's cool, I'll just avoid GDC for now. Is it generally a 
good approach to assume if something compiles in DMD then it's 
correct and just hope that GDC/LDC pick up the latest version at 
some point?