Build utf.d with MS-COFF failed

[Charles via Digitalmars-d-learn]

On Friday, 20 November 2015 at 21:27:12 UTC, Pierre wrote:
> Hello, I can't build my project with MS-COFF option.
>
> I'm using DMD 2.069.
>
> I got this error :
> utf.d(1109) : invalid UTF-8 sequence (at index 1)
>
> I used these options with visual D:
> Compiler       : DMD
> D-Version      : D2
> Output Type    : DLL
> Subsystem      : Not set
>
> Compilation    : Combined compile and link
>
> Thank you for your help.

What string is throwing the error? I've had that error when I was 
trying to decode windows1252 strings.