I want this so badly, please implement

[Nordlöw via Digitalmars-d]

On Thursday, 7 April 2016 at 02:00:39 UTC, Adam D. Ruppe wrote:
> https://issues.dlang.org/show_bug.cgi?id=15889

Could you please add a test-program with current and wanted 
behaviour?

Do you mean that the index and length are lost in the compiler 
which should then be passed to the RangeError object? Could you 
highlight the details?

If both dmd and druntime/phobos needs to be updated could you 
point out some source locations of interest?

I might give this a try.