Better diagnostics for null classes dereferencing

[kdevel]

On Tuesday, 10 July 2018 at 21:09:23 UTC, Steven Schveighoffer 
wrote:
[...]
> As far as the OS is concerned, a[2 .. $] is within the process 
> memory limit.
>
> Of course, that's an out of bounds access, so the compiler or 
> the bounds check *should* complain.

It complains at runtime

    > ./dumpme2
    core.exception.RangeError at dumpme2.d(4): Range violation
    ----------------
    ??:? _d_arrayboundsp [0x42bb1e]
    dumpme2.d:4 _Dmain [0x42ba42]

but how do I force the runtime to generate a coredump for real 
post-mortem analysis?