Is there a pragma or command line option to ask DMD to show a warning when it implicitly casts from long to ulong ?

[Michael]

On Friday, 15 December 2017 at 21:29:10 UTC, Jonathan M Davis 
wrote:
> On Friday, December 15, 2017 20:40:10 Ecstatic Coder via 
> Digitalmars-d-learn wrote:
>> It's taken me some time to find an implicit cast bug ("if 
>> (my_sometimes_negative_index >= this_array.length)"), while a 
>> simple C++-like implicit-cast warning would have allowed me to 
>> find this nasty bug WAY sooner...
>
> No.
>
> https://issues.dlang.org/show_bug.cgi?id=259
>
> - Jonathan M Davis

How does something like this get left for so long...